Apparently my OAuth implementation didn't support POST yet

Also made the /1/clipboard/update page somewhat functional.

Signed-off-by: Toon Schoenmakers <nighteyes1993@gmail.com>
ClipboardUpdate will now send an actually reply

And yes you see that correctly, it's just an empty json object.
Because that is in the spec that which was given to me, any input
on this @Marlinc?

Signed-off-by: Toon Schoenmakers <nighteyes1993@gmail.com>