Merge topic 'bar-chart-colors' into pv-master

b2e4fb38 Added colored bar charts, along with a test
Merge remote-tracking branch 'pvvtk/pv-master' into HEAD

* pvvtk/pv-master:

Change-Id: Ib2f59ff5809fa6d9e7ebc75d57fa40fb72fa9e9f