Added background to user login page:

- Added user_index div users#new
- Added cleafix div to trip index
- Added background for user login
Merge pull request #135 from nealfennimore/f/user-bg

Added background to user login page:
Added error messaging bootstrap formatting to signup/login
Merge branch 'master' of https://github.com/spring-peepers-2014/TravelBlog