gradle plugin version update for 1.0 release.
specified required play services packages.
Merge pull request #1317 from ne0fhyk/gradle_update

Project libraries and plugin update
Merge branches 'dp3' and 'master' of https://github.com/DroidPlanner/droidplanner into dp3

Conflicts:
	Android/build.gradle
	Core/build.gradle
	build.gradle