| Version | Type | Date |
|---|---|---|
| 2.2-RC6 | candidate | Oct 2015 |
| 2.2-RC5 | candidate | Oct 2015 |
| 2.2-RC4 | candidate | Oct 2015 |
| 2.2-RC3 | candidate | Oct 2015 |
| 2.2-RC2 | candidate | Oct 2015 |
| 2.2-RC1 | candidate | Oct 2015 |
| 2.2-M1 | release | Oct 2015 |
| 2.2 | release | Oct 2015 |
| 2.1-RC3 | candidate | Oct 2015 |
| 2.1-RC2 | candidate | Oct 2015 |
| 2.1-RC1 | candidate | Oct 2015 |
| 2.1-M1 | release | Oct 2015 |
| 2.1 | release | Oct 2015 |