SYS_ENCODING set to System Default
Merge pull request #117 from Prinz23/SYS_ENCODING_fix2

Fix SYS_ENCODING - Set System Default if UTF-8 fails
Update growl.py with missing registration of update notification
Update CHANGES.md

Added line to growl registration which adds common.NOTIFY_GIT_UPDATE as a sickrage notification type.
growl on some systems will not show notification unless it is registered.
Merge pull request #122 from bjtaylor93/growl-update-registration

Fix growl registration not sending sickrage update notification registration