Floor Mats

Added recipes for gilded connected blocks.

Added camouflage floor mats that take on the appearance of whatever block they are placed on.  They otherwise act identical to the gilded floor mats.

Fixed the sounds so that it clicks during activation and deactivation.

Added the ability to modify the floor mats.  This includes muffling (silencing).  For gold/gilded mats, there is also inverting and opening.  Inverting makes it so that only players that didn't place the floor mat activate it.  Opening clears the mat's list of players so that any player will activate the mat.  The /floormats help command will detail how to get more info on these modifications (except the opening of the mats, which is undocumented and done by holding an iron block in one hand while wrenching the floor mat with a connector held in the other hand.