Added support for posting to a group in a community.
Incremented to version 1.1 per discussion on pull request 6.
Merge branch 'communities-support' of https://github.com/javamate/JavaChatterRESTApi into javamate-communities-support

Added support for posting to a group in a community to the PostToGroupCommand
Updated version to 1.1

(Thanks javamate!)

Conflicts:
	build.gradle
Merge branch 'javamate-communities-support'