Build version bump.

Version 2.3.0 release.

Version 2.2.1 release.

Version 2.2.0 release.

Release v2.1.0

v2.0.1 release

Version 2.0.0. release.

Major version bump due to new API for grafana 5.0 support.
Old API still supported but deprecated.

Source code changes for 1.0.0 version number.

Initial opensource release.