Updated README's copyright
Merge remote-tracking branch 'upstream/master' into V1.6
V1.6 - COP Template for FV3.4 - Removed random issue in ERGChemical charts
Merge remote-tracking branch 'upstream/master' into V1.7
V1.7- COP Template for FV3.4 - Implemented token based authentication for PDC widget

Incorporated following changes:
1. Implemented token based authentication for PDC widget
2. Changed images in Social media widget
Merge remote-tracking branch 'CT/V1.7'