Added debug information to site layout for debug rails environment
Added Users resource to routes file, stubbed view for showing user information, and show action to Users controller.
Added test for user show page using factories, and redefined bcrypt's cost factor to minimum for test environment.
Defined function gravatar_for that retrieves an avatar image from gravatar sites for a specific user.
Added side bar to user show, and scss styling for user show page and side bar.
Finished user signup
Merge branch 'feature/user-sign-up' into develop
Add optional size of gravatar image