Merge pull request #1 from nysa/master

Fix flickering issue when switching to different feeds
Extract helpers into separate module
Update gems
Add opml import class
Try to read file before parsing opml data
Use latest ruby 2.0
Readme update
Add user model and migration
User development
API authentication, user profile endpoint, tweaks
Move controllers requirement outside of application class
Remove documentation from users controller
Add bcrypt-ruby gem
Add user authentication
Add API authentication
Refactoring, authentication tests
Refactoring
More testing and development
Fix application spec
Fix feed spec