[CB-2448] Added upgrade script for cordova projects
reverted .csproj file to explicitly list all plugins
Updated distribution tools
Set VERSION to 2.8.0rc1
Removed cordova js building from dist script
Update JS snapshot to version 2.8.0rc1
(cherry picked from commit fe79571aed0b5e578ca22f53648255e3a067376f)
updates for rc1