adding python 3.5 as a target (#481)

* adding python 3.5 as a target

* adding env flag

.travis.yml

@@ -23,6 +23,9 @@ cache:
 env:
   global:
     - PIP_DOWNLOAD_CACHE=".pip_download_cache"
+    # do not load /etc/boto.cfg with Python 3 incompatible plugin
+    # https://github.com/travis-ci/travis-ci/issues/5246#issuecomment-166460882
+    - BOTO_CONFIG=/doesnotexist
 
 before_script:
   - psql -c "create database lemur;" -U postgres

setup.py

@@ -200,6 +200,7 @@ setup(
         "Programming Language :: Python :: 3",
         "Programming Language :: Python :: 3.3",
         "Programming Language :: Python :: 3.4",
+        "Programming Language :: Python :: 3.5",
         "Natural Language :: English",
         "License :: OSI Approved :: Apache Software License"
     ]