Support emitting events from the course index page

Change-Id: Ib8b322e7ec8c56a94b316e950394e40165a6a453
Merge pull request #130 from edx/gabe/additional-tracking

Track additional events
Integrate with Travis CI and coveralls.io
TE-475
Merge pull request #132 from muhammad-ammar/ammar/travis-and-coveralls-integration

Integrate with Travis CI and coveralls.io
Unfiltered "unknown" countries from the geo data.