Tag release 5.1.5-rc1.

Change development version tag to 5.99.0.

Release 5.1.4.

Release 5.1.3.

5.1.2 stable release.

5.1.1 stable release.

Tag 5.1.0 release.

Tag release 5.1.0-rc2.

Tag 5.1.0-rc1

Tag release version 5.0.2.

Stable release 5.0.1

5.0.1-dev release.

5.1.0-dev release.

6.0.0-rc1-dev release.

5.0.0 release.

5.0.0-rc3-dev release.

5.0.0-rc3 release.

Tag version 5.0.0-rc2.

Tag 5.0.0-rc2 development

Version 5.0.0-rc1