Restyle registration page.

Our registration page had some styling issues. Here we add in the profile image
from the web site as a placeholder. This is done by layering the user added
image on top of a static image that is controlled in the login storyboard.
Background color is also added to the view controller and autocorrect is
disabled for username, first name, and last name fields.
Merge branch 'topic/registration-page-styles'

Conflicts:
	OpenTreeMap/OpenTreeMap.xcodeproj/project.pbxproj