Bug 1104003 - [Loop][Rooms] Create basic 'room' screen

See bug https://bugzilla.mozilla.org/show_bug.cgi?id=1104003 please. Action happens at https://github.com/jaoo/firefoxos-loop-client/tree/1104003.
Maybe this will be a view which will appear with fade effect but it will be addressed in the future, of course, it is a basic ui, so this comment does not make sense at all