Merge pull request #2 from asolkar/function

Added preliminary user authentication
Added admin interface
Fixing admin files precompilation issue
Reenabling precompilation
Adding print.css to precompile list
Changes:

* Moved precompile restrictions to production env
* Added a requirement for logged in user for user interactions
Cleaned up template with more shared views
More streamlining of layouts
Added shops and items
Added a dropdown menu for logged in user
Added signup button alongside login button

Also setting up development environment with sqlite
Changed buttons to use bootstrap classes
Added field types to some forms
Ading back the Gemfile.lock file
Removing vendor/plugin, to be deprecated in Rails 4.0
User specific actions

* Singular routes for logged in user
* Restrict actions based on logged in user
Added ability to add items to shops
User access changes

* Added :name to User model
* Using :name for authentication instead of :email
* Added route so that /name can be used to access user profile
Changed user.name to user.username
Redirecting to profile after logging in