mark part origins
move damcon part and socket origin
make socket/part matching more precise
do not draw sockets containing something
Fix locking bug with moving damcon objects.

universe mutex needs to be held while moving damcon objects to keep
from racing with client update threads.  This is what happens when
you step away from the code for too long.
Fix timestamp setting for damcon objects (needs to be universe_timestamp + 1)
reduce distance at which parts are grabbable