diff --git a/README b/README
new file mode 100644
index 0000000..25310d8
--- /dev/null
+++ b/README
@@ -0,0 +1,17 @@
+--------
+LICENSES
+--------
+
+Tiramisu is under the terms of the GNU General Public License v3.0 as 
+published by the Free Software Foundation; either version 3 of the 
+License, or (at your option) any later version.
+
+See gpl-3.0.txt for more informations.
+
+Contributors:
+
+Gwenaël Rémond <gremond@cadoles.com> lead developer
+Emmanuel Garette <egarette@cadoles.com>
+
+
+
diff --git a/autolib.py b/autolib.py
index c4ea2fb..4b75aec 100644
--- a/autolib.py
+++ b/autolib.py
@@ -1,3 +1,22 @@
+# Copyright (C) 2012 Team tiramisu (see README for all contributors)
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+# The original `Config` design model is unproudly borrowed from 
+# the rough gus of pypy: pypy: http://codespeak.net/svn/pypy/dist/pypy/config/
+# the whole pypy projet is under MIT licence
 "enables us to carry out a calculation and return an option's value"
 
 # FIXME: import eosfunc here
diff --git a/config.py b/config.py
index 871d6d1..86b246d 100644
--- a/config.py
+++ b/config.py
@@ -1,7 +1,24 @@
 # -*- coding: utf-8 -*-
 "pretty small and local configuration management tool"
+# Copyright (C) 2012 Team tiramisu (see README for all contributors)
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
 # The original `Config` design model is unproudly borrowed from 
 # the rough gus of pypy: pypy: http://codespeak.net/svn/pypy/dist/pypy/config/
+# the whole pypy projet is under MIT licence
 from error import (HiddenOptionError, ConfigError, NotFoundError, 
                 AmbigousOptionError, ConflictConfigError, NoMatchingOptionFound, 
                             SpecialOwnersError, MandatoryError, MethodCallError, 
diff --git a/doc/Changelog b/doc/Changelog
deleted file mode 100644
index 77a7916..0000000
--- a/doc/Changelog
+++ /dev/null
@@ -1,14 +0,0 @@
-2012-03-23
-
-    - set_group_type (instead of set_descr())
-    - iteration utilities (for -> on option, iter_group -> on 
-     OptionDescriptions (group of options)
-    - hide and disable for option groups (and subgroups) -> not OK
-
-2012-03-20
-
-    - get() method for recursive attribute access
-    - make_path() in a flatten way
-    - ro and rw  
-    
-
diff --git a/doc/build/tiramisu.tar.gz b/doc/build/tiramisu.tar.gz
deleted file mode 100644
index 1820be3..0000000
Binary files a/doc/build/tiramisu.tar.gz and /dev/null differ
diff --git a/doc/getting-started.txt b/doc/getting-started.txt
index c72a671..5e8a228 100644
--- a/doc/getting-started.txt
+++ b/doc/getting-started.txt
@@ -39,7 +39,7 @@ To obtain a copy of the sources, check it out from the repository using
 
 ::
 
-    git clone ssh://gitosis@git.cadol.es:2222/tiramisu.git
+    git clone git://git.labs.libre-entreprise.org/tiramisu.git
 
 This will get you a fresh checkout of the code repository in a local 
 directory named ``tiramisu``.
@@ -57,8 +57,7 @@ into a configuration object, which is available nearly everywhere, so
 that adding new options becomes trivial.
 
 This `Config()` is available from everywhere with the help of an http server
-that serves configuration datas as `json` strings (take a look at the server
-here: :api:`server`). 
+that serves configuration datas as `json` strings. 
 
 .. figure:: architecture.png
    
diff --git a/doc/todo.txt b/doc/todo.txt
index 9891062..1da6c8b 100644
--- a/doc/todo.txt
+++ b/doc/todo.txt
@@ -1,3 +1,35 @@
+:date: 20 janvier 2012
+
+créer une variable implicite cachée
+
+:: 
+
+    <variable name="toto"
+
+    exists='False' hidden='True'>
+    <value>non<value>
+
+si la variable n'existe pas, elle est crée avec une valeur par défaut
+
+cela permet une alternative aux dépendances (pour ne pas installer un 
+paquet inutilement)
+
+coder ça exactement comme les hidden ou les disabled, avec une levée 
+d'exception supplémentaire comme filtre.
+
+:date: 20 janvier 2012
+
+coder un cache pour les options dont le propriétaire est "auto" ou "fill"
+mettre ça dans un attribut `_cache` de l'option 
+
+mettre une contrainte de temps dans le cache
+
+- pouvoir forcer le recalcul de toutes les variables (vider le cache)
+  globalement dans toute la config
+
+- mettre une contrainte de temps donnée 
+  time = 1000
+
 :date: 17 avril
 
 - lever une exception parlante (pour l'instant, c'est une "KeyError") 
diff --git a/gpl-3.0.txt b/gpl-3.0.txt
new file mode 100644
index 0000000..818433e
--- /dev/null
+++ b/gpl-3.0.txt
@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
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+copy of the Program in return for a fee.
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+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
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+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
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+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
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+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
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+Also add information on how to contact you by electronic and paper mail.
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+  If the program does terminal interaction, make it output a short
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+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
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+The hypothetical commands `show w' and `show c' should show the appropriate
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+might be different; for a GUI interface, you would use an "about box".
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+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
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+  The GNU General Public License does not permit incorporating your program
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+may consider it more useful to permit linking proprietary applications with
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+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
diff --git a/option.py b/option.py
index 3af1c45..23bc191 100644
--- a/option.py
+++ b/option.py
@@ -1,5 +1,24 @@
 # -*- coding: utf-8 -*-
 "pretty small and local configuration management tool"
+# Copyright (C) 2012 Team tiramisu (see README for all contributors)
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+# The original `Config` design model is unproudly borrowed from 
+# the rough gus of pypy: pypy: http://codespeak.net/svn/pypy/dist/pypy/config/
+# the whole pypy projet is under MIT licence
 from error import (ConfigError, ConflictConfigError, NotFoundError, 
                                                                   RequiresError)
 available_actions = ['hide', 'show', 'enable', 'disable'] 
diff --git a/tool.py b/tool.py
index 9e5db1f..2291849 100644
--- a/tool.py
+++ b/tool.py
@@ -1,3 +1,22 @@
+# Copyright (C) 2012 Team tiramisu (see README for all contributors)
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+# The original `Config` design model is unproudly borrowed from 
+# the rough gus of pypy: pypy: http://codespeak.net/svn/pypy/dist/pypy/config/
+# the whole pypy projet is under MIT licence
 from config import Config
 from option import (OptionDescription, Option, ChoiceOption, BoolOption, 
                     FloatOption, StrOption, IntOption, IPOption, NetmaskOption,