Removing code to add functionality.  Reduced the explosion for the
drilled hole entity, but it's still too large.  If I try to take it down
any further, it will not explode at all.

Removed some motion code from the original lit block code.  I guess the
idea is tnt should dance around.  I don't want that in my block.

I started annotating the explosion code.  It's very bizarre.  I think I
will need a full understanding of it before I get into lots of explosives,
so it's time to start digging in.