Merge pull request #34 from dabeeya/master

tests and edit button
updated reamde
Merge branch 'master' of https://github.com/red-spotted-newts-2014/stacksonstacks
Add vote method to answer model.
Merge branch 'master' of https://github.com/red-spotted-newts-2014/stacksonstacks
Merge pull request #35 from user1011/master

Fix edit answer
Add edit functionality to answers
Merge branch 'master' of https://github.com/red-spotted-newts-2014/stacksonstacks