Make basic User model (including secure passwords)
Merge branch 'modeling-users'

* modeling-users:
  Make basic User model (including secure passwords)
Finish user sign up
Merge branch 'sign-up'

* sign-up:
  Finish user sign up
Add SSL in production
Precompile assets for heroku
Update assets
Improve gravatar helper
Finish sign in
Merge branch 'sign-in-out'

* sign-in-out:
  Finish sign in
finish user edit update index and destroy actions