Hydrogen has been released, update version.
Explain how version bumps should be made
Add attribute which will allow release names match by version.
Include version codename in the generated version string.

Fixes #12205.
Hydrogen is now in it's .3 release.
Merge pull request #12219 from s0undt3ch/issues/2014.1-12205-invlude-version-codename

[2014.1] Include version codename in generated version string