Add fuubar
Update Gemfile
Merge pull request #281 from jsyeo/jsyeo-fuubar

Add fuubar
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.
Add tests to check editing of Mission title, description and experience.
Use lecturer use for Mission tests. Use updated course creation method for tests.