API enhancements

[tsdevelopment]

Please consider the following API enhancements:

• Return content a guest would see if no token has been sent with the request.
• Requesting the forum list (/api/forums/forums/ does not make any sense at the moment b/c you can not differentiate if you have a category or if an item is a parent of another one. Please organize the returned structure in a better way or give the possibility to organize the returned structury through parameters.
• Return unread content for authenticated members
• Return the topic a post is related to

[heydoon]

Yes please add these changes.