Fix installation for non EOLE developpers

The version is extracted from “relase/” tags and they exists only on EOLE
git repository.

* Makefile (install): Depends on version file.
  (version.in): Fake dev version for developpers without devel release
  tags

* setup.py: Add missing subprocess import.
  (fetch_version): Use same fallback version as Makefile.

Makefile

@@ -56,13 +56,16 @@ install-lang: build-lang
 	$(INSTALL_DIR) $(TRADUC_DEST)
 	$(call install_translation, $(TRADUC_DIR))
 
-install: install-lang
+install: version.in install-lang
 	python setup.py install --no-compile $(PYTHON_OPTS)
 
 # List in .PHONY to force generation at each call
 version.in:
 	@if test -n $(VERSION) ; then \
-		echo $(VERSION) > $(VERSION_FILE) ; \
+		echo -n $(VERSION) > $(VERSION_FILE) ; \
+	fi
+	@if test ! -s $(VERSION_FILE); then \
+		echo -n '0.0-dev' > $(VERSION_FILE); \
 	fi
 
 dist: version.in

setup.py

@@ -3,11 +3,12 @@
 from distutils.core import setup
 
 import os
+import subprocess
 
 def fetch_version():
     """Get version from version.in or latest git tag"""
     version_file='version.in'
-    version = "0.0"
+    version = "0.0-dev"
     git_last_tag_cmd = ['git', 'describe', '--tags', '--abbrev=0']
 
     try: