Minor fixes and changes ...
OAuth2 #58: Towards refreshing access token ...
OAuth2 #58: Requesting Refresh Token seems to work ...
OAuth2: Closes #58 Necessary features implemented ...
www/inc/debug.inc.php: Disabled ...
Merge pull request #65 from NochEinDirk/my-contribution

Closes #58: OAuth2 ready for use ...
Merge pull request #66 from germandota-de/master

Live: OAuth stuff again ...