* pathfinding on fences apparently still needs work (re-enable push-out
of blocks whenever inside a fence block?)
* soldier health display float rounding
* village component/generation 1.6.4 support (add mapping to
structuregenIO, default no-param constructors)
* switch airplane/helicopter/submarine to be disabled by default.  In
order to use these vehicles, you will need to enable them in your config
file. 
    THIS WILL DELETE ANY CURRENT ENTITIES OF THESE TYPES IN YOUR WORLD
WHEN THE CONFIG FILE IS REGENERATED.  IF YOU WISH TO KEEP THESE, RUN MC
ONCE (DONT LOAD YOUR WORLD),
    EXIT MC, OPEN THE CONFIG FILE, RE-ENABLE THEM, AND THEN START
MC/LOAD YOUR WORLD