Bump version to 2.2.0; fix versioning script

Merge pull request cydrobolt#266 from cydrobolt/fix/compat-5.5.9

Compatibility patch for 2.1.0

Bump 2.1.0

Bump version to 2.0.0 stable

version bump 2.0.0rc1

Remove extra spacing

Add missing env template

Denote alpha ver

clarify file usage

Update version.php