Removed empty current_user method
adding bitly url shortner to challenge controller
making modifications to have twitter api key reference the ENV variables
Moved bitly methods to challenge model.  Added obtaining of a bitly url for the challenge as party of the create action in Challenges controller.
site now redirects to user's challenges page after sign-in
put user_challenges view form in unordered list and added labels
Added seeding of Status model with valid conditions
corrected acceptance and rejection challenge buttons on challenges show view
added concession button
included tweeting after challenge creation
removed ref to local database username and password
resolving challenge username problem
home page now redirects to the user's challenges if the user is signed-in
removed unnecessary temporary root view that was originally only used in testing
added separate field for username on challenge create form
added tweet after concession
correcting rspec tests
removing local db username and password
Merging master into tweet_create2 branch to incorporate latest changes and push into repo.
made the list of challenges into links