Add visualizer to coordinate selectors and graphs

Change-Id: I730fc02cece2d56ce165590d4cde777b2cb248be
Project and language choices component

Retrieval of project and languages is done via wikimetrics api.  Styling
of the bootstrap component is done manually (needs to be styled with semantic ui).

Change-Id: I0e8e2455b3ae7cbe155e14f6fc97b56d88598edc