added contribution views
Merge pull request #18 from Adrian-Pask/Chore/Contribution-associations

ContributionController + views - new, create
Awesome! TH
fixed some css merge conflicts between branches
Merge pull request #16 from onweapps/master

controller and model tests for contributions added
Merge pull request #19 from keaty/master

fixed some css merge conflicts between branches
Merge branch 'master' of https://github.com/fiddler-crabs-2014/StoryZilla