Add coveralls
Add coveralls and travis badges
Merge pull request #267 from jsyeo/jsyeo-add-badges

Add coveralls and travis badges
Merge pull request #266 from jsyeo/jsyeo-coveralls

Add coveralls
Ignore coveralls coverage directory
Merge pull request #270 from jsyeo/jsyeo-coveralls

Ignore coveralls coverage directory
Use new expect syntax for mission display test.
Write some tests to test Mission editing functionality.

Add Mission using factory girl.
Add test to check that mission creation has the success message.
Add test to check that edit form loads properly.
Merge branch 'mission-tests' of github.com:fonglh/coursemology.org into mission-tests