Implemented trapped chests & others

+ Added trapped chests
* Fixed a bunch of bugs in the redstone simulator concerning wires and
repeaters
* Other potential bugfixes

I hereby present to xoft, ONE METRIC TON PRECISELY -----------------
-------------------------------  of code to review.

With thanks.
Because only wires power off instantly. Other things like repeaters and torches have a delay. Besides, I think wire logic should be confined as best as possible to the wire handler; the special conditions in SetBlock(Linked)Powered are already dissatisfactory :P