Updated model and controller to allow voting

* New column 'votes' on Idea model
* RESTful routes for IdeasController
* member action 'upvote' for IdeasController
* specs

USe XHR to update the votes

Finish xhr; use image

Feature specs
Added format, color and other options to Guardfile
Moved common body to before, separated assertions, changed expect to be on the results not the call to upvote
Merge branch 'f6_vote_for_an_idea'
Moved debugger to development
Merge branch 'fixing_dependencies_for_travis_ci'
Added config for travis, separated debugger to another group in gemfile
Merge branch 'fixing_dependencies_for_travis_ci'
Renamed travis.yml to .travis.yml
Fix Gemfile; run migrations in Travis