Merge pull request #9 from rspieldenner/gradle-2.2

Add ability to release last tag. Add ability to manually set and tag a v...
Merge pull request #10 from rspieldenner/gradle-2.2

Finalize for release. Fix property check.
[Gradle Release Plugin] - pre tag commit:  '2.2.0'.
[Gradle Release Plugin] - new version commit:  '2.2.1-SNAPSHOT'.
Add settings.gradle, reset to original version