Bump version to 2.2.0
Preparing release 1.0.3.
Add missing file.
Tag release 0.8 in revision history.
Added missing file.
Tag release 0.6.6 in revision history.
Tag release 0.6.5 in revision history.
Tag release 0.6.4 in revision history
Tag release 0.6.3 in revision history
Tag release 0.6.2 in revision history