Update .travis.yml

Adding python 2.6 to travis
Merge pull request #11 from supervacuo/master

Python 2.6 compatibility
Fix #16. Move the check inside the previous if block to avoid 'latest_timestamp to be undefined'.
manual merge
Fix #10. Added the url to the minion. The url is constructed based on the SITE_ID. We should probably expose this somewhere else than in the admin.
Update utils.py

Fix the build for python 2.6
fix #10. Use a new settings variable instead of the django.contrib.site framework.
Merge branch 'master' of github.com:lincolnloop/salmon
Use a full URL and prompt on install.

refs #10
Fixes yaml for travis
Fix a bug in the logic of the TypeTranslate (bool('False') == True)
Prevent NameError with 0 results in database