Updated ChangeLog for version 0.2.2 release.
Updated ChangeLog for version 0.2.2 release.

Change-Id: I3d349b79b699fb863b3f9609125463b517d073ee
Signed-off-by: Christopher M. Cantalupo <9cf3ecca60a3dd7112ab0e7250bedb8a752e3958@intel.com>

cmcantalupo/geopm,cmcantalupo/geopm,cmcantalupo/geopm,geopm/geopm,sssylvester/geopm,cmcantalupo/geopm,geopm/geopm,sssylvester/geopm,cmcantalupo/geopm,sssylvester/geopm,geopm/geopm,geopm/geopm,geopm/geopm,sssylvester/geopm