rewrote autoplacement code to make it more aware of filters,

rewrote autoplacement code to make it more aware of filters,
autocrafter, nodebreaker, deployer, and made sure each item will only
initiate a connection to those sides which can accept such.  Fixed
various autorouting bugs as I ran across them.  Autorouting for various
devices is now:

filters: left and right sides only
nodebreaker, deployer:  back only
autocrafter:  all six sides
chests:  top, bottom, left, right, back (not front)
furnace: bottom, left, right, back (not the top or front)