Push coverage stats to coveralls
Added test for sessions controller
Add test for PresentationsController
Link to the Travis Build [ci skip]
Merge pull request #29 from jcoyne/session_controller_spec

Added test for sessions controller
Merge pull request #30 from jcoyne/coveralls

Push coverage stats to coveralls
Merge pull request #31 from jcoyne/link_to_travis

Link to the Travis Build [ci skip]
Badge improvements

* Add badge for Coveralls
* Switch to shields.io SVG badges.
Add badge for Scrutinizer.