[Bug #6750] Adding and removing of a state fires an "statesChanged" event
[Bug#6639] Command switched from qx.ui.core to qx.ui.command.Command name space.
New property "active" implemted. If "active" is set to false, command will be deactivaed and execute event want fire.
If "enabled"  is false execute event wouldn't fire.
[Bug#6639] Command group implemented.
[Bug#6639] Command group manager implemented.
[BUg#6639] API wording changed
[Bug#6639] Command group and manager finalized.
[Bug#6639] Minor
[Bug#6639] Minor
[Bug#6639] Assertion checks implemented.
[Bug#6639] Assertioncheck implemented.
[Bug#6639] API documentation enhanced.
[Bug#6639] Test methods reorganized
[Bug#6639] Check of property command refactored.
[Bug #6750] Minor bugfix.
[Bug#6639] Deprecation warnings implemented.
[BUG #6639] Edit migration data.
[BUG #6639] Deprecation warning editted.
[Bug #6639] Name space for command changed in all sources. New demo implemented
[Bug #6639] Documentation enhanced about command group and manager
[Bug #6639] Link to demobrowser example included