Upgrade to rails 4.0
Fix some more Rails 4 issues
Merge branch 'master' into rails-4
Merge branch 'master' into rails-4

Conflicts:
	Gemfile.lock
	app/models/post.rb
Merge pull request #50 from mutle/rails-4

Rails 4 upgrade
Remove attr_accessible from image
Remove asset pipeline from uploader
Remove observer
Merge branch 'master' into rails-4

Conflicts:
	Gemfile
	Gemfile.lock
	app/controllers/session_controller.rb
	app/models/post.rb
	app/models/user.rb
Disable attr_accessible for notifications
Merge branch 'master' into rails-4
Fix notification counters and seperate messages from mentions
Staging env and notification fix
Big code cleanup
Remove more old stuff and add new readme
Autocomplete mentions and emojis
Fix mention autocomplete
Fix unauthorized layout
Make autocompleter case insensitive
Fix mention parsing bugs