Add a Travis CI configuration file
Only test the pybb app on Travis
Install packages on Travis as superuser
Tell thirdparty example app where to find pybb.

- Add project root to sys.path in example_thirdparty/manage.py
Merge pull request #51 from openplans/travis-settings

Add a Travis CI file for automated testing of pushes and pull requests
Merge branch 'master' into pluggable_authorization