This reverts commit 1481056a.

This reverts commit fb70dc8c, reversing
changes made to 53fef63a.

Conflicts:

	pkg/fedora/diaspora-setup
	pkg/ubuntu/diaspora-setup
	public/stylesheets/sass/application.sass
	spec/models/user/attack_vectors_spec.rb

Remove downcasing of diaspora_handle, verify that diaspora_handle querying and validation is case insensitive.

username can be any case, but diaspora handle should always, always, ALWAYS be lowercase, for webfinger reasons

Fixed pending people_controller spec; cleaned up person.search(this is ruby :D ); fyi, calling should_receive stubs that method, hence this test confusion