Adds stubs and tests for GlanceImageService and LocalImageService. Adds basic plumbing for ParallaxClient and TellerClient and hooks that into the GlanceImageService.
Adds stubs and tests for GlanceImageService and LocalImageService.
Adds basic plumbing for ParallaxClient and TellerClient and hooks that into the GlanceImageService.

Fixes lp654843
n0ano/ganttclient