Add github profile to user
Merge branch 'add_github_login' into 2014

Conflicts:
	app/views/cfp/application/_formatted_proposal.html.haml
Set ruby 2.0
Merge remote-tracking branch 'origin/2014'
No 'your' in texts of 'Edit profile' section
cfp engine updated
Options in 'Show proposals' with normal user, fixed
Add i18njs
refactor button rate
Chance edit profile button

* Add form edit backbone view
* Add translations
Update gemfile
Remove edit profile on new action
Add cancel button to proposal
Change rate proposals to my proposals when needed
Prevent create empty comments
Remove extra to from terms
HTML tags added to require information in some imputs
Changes merged
Conflics fixed
HTML tag of required field, fixed