Refactored GetGroupID
Remove siteUrl from summary header
Removed documentation folder from solution package
Fixed typo with the background image path
Adjusted readme file to solution
Adjusted readme file to be part of the solution
Merge branch 'dev' of https://github.com/officedev/pnp into dev
Merge remote-tracking branch 'contributor/groupmgtfix' into pr180
Updates to match with the changed GetGroupID signature
Merge branch 'dev' of https://github.com/OfficeDev/PnP into dev