Removing useless files in agowbug
Adding support for "on" and "off" commands in agousbcam

This requires a modification of media.yaml schema, in order to add "on" and "off"
commands to camera device. This allows disabling the cmaera, for example when someone
"legal" is present in the house, to protect privacy
Adding unavailable camera picture
New wbug version with basic transmit possibilities

Type is processed and data is sent. Node state is not taken into account (no sending queue)
New version with functional message transmission