Performance improvement for #59.  Search for sensitive blocks is now
iterative.  The sensitive block erasure does not appear to be working
because of falling gravel.
Finally fixed iterative sensitive block handling for #59.
Changed the Faith template to a plus sign (with Gold Block on top).
This changes the energy scaling to allow radius 1 cobblestone islands as
well as slightly larger beacon islands.  Coal islands are now
drastically smaller.
Added orphan code for RandomHashSet.  Feel free to try using this in the
Worker if you want less liney animations.
Killed silly log spam from debugging.
Merge with our BDFL branch and started work on configs

Signed-off-by: Anthony Anderson <LordIllyohs@gmail.com>