Use ids rather than Meshes when specifying default / loading geometries.

This allows them to be reloaded when required, thus fixing
http:/b/3237395

Change-Id: I9eea73d85a8c272debbfb45d5577ded185cf8112
3 files changed
tree: eca40e090fb1101b96acab1c722b4f996048de44
  1. carousel/
  2. common/
  3. CleanSpec.mk