extracted user authentication to user_authentication_controller
added admin video routes
wired 'new' action for admin video controller
added admin column to users table
added opts to #set_current_user to choose admin role
added 'requires admin' example
removed empty trailing spaces
admins controller and 'admin/videos' controller with inital specs(unfinished)
added carrierwave and fog gems
added minimagick
renamed large and small cover column names
finished admin video controller and spec
removed unused routes
updated attribute name in views after column change
setup carrierwave and generated first uploaders
mounted uploader for small and large cover
updated images path to fix broken images on seed data
updated excon gem
added uploads dir to ingore list
cleaned comments