Bryan's first rune.  Elevator that ferries player up and down based on
open spaces.  Doesn't consume energy.  Very complex 3D template.
Renamed KEY to FUEL because it has nothing to do with keys.
Very important fix for Key-- now FuelBlock recognition on all runes.
Builder Rune working much better now.  NESW facing detection implemented
by changing checkRunePattern signature.  Possible regressions:
aetherSay.  Runecraft not rotating facing.
minor spelling
Major: restructured the way that runes communicate what blocks they're
connected to.  added usesConductance as an attribute of all runes, runes
can now tell what blocks make up their pattern.  Runecraft is really
slow.
Faith remembers structure for better performance.
Attempting additional performance improvements for large islands.
Sphere is saved unless invalidated by a move.
Beacon taken down two tiers for being renewable.
Merge branch 'master' of https://github.com/Runix-Minecraft/Runix