login and signup on everypage with logout
got rid of username
changed schema for the change
added route for user#show
added a link_to for the show page and corrected the route
corrected user controller errors
added the @user to usercontroller
added created chall and solved chall to user#show but found error in association
corrected the error in the user model
corrected user model test
Merge pull request #17 from kma3a/user

User