add spec and implementation of Video.search_by_title method
improve search_by_title method based on solution video
implement search ui
adjust top nav header styles
Spec and implement the recent_videos method in Category.
Update home page to use recent_video for each category.
Hook up ui (view only) for front page, register page and sign in page
rearrange routes for login and register
Add users model and spec
implement user registration and user login
hide features if user not logged in
fix missing newline at end of file
implement bootstrap_form on sign in and registration page
redirect user to home for sign in page if user already logged in
remove a before_filter call per Steve's comment