FLOE-211: Removed pouchDB from the metadata demo.
FLOE-211: Code clean up and improvement.
FLOE-211: Initialize the metadata component models by either direct assignment or via model relay.
Merge remote-tracking branch 'cindy/FLOE-211'

* cindy/FLOE-211:
  FLOE-211: Initialize the metadata component models by either direct assignment or via model relay.
  FLOE-211: Code clean up and improvement.
  FLOE-211: Removed pouchDB from the metadata demo.