Move the color maps to core/, so core elements can see them.  This is questionable from an embedded point of view but nothing actually gets used unless and until Element::LocalPhysicsColor gets called, which core/ doesn't.
Add a 'selector' arg to LocalPhysicsColor, allowing multiple types of local colorings.  Currently 0 implies 'default', 1 implies 'gradient' or 'heat', and nothing else is defined.  An element that doesn't wish to provide heat-coloring should return through its DefaultPhysicsColor().
Some extra color map changes, missed in the original commit grr
Additional local physics selector stuff missed in the original commit grrr
Add some 'bounded by' functions in Point and clean it a bit.  Also, YMCC (Yet More Const-Correctness).
Preliminary not-yet-activated structure for supporting bit corruption in atoms
Support for 'accelerating' AEPS recording.  Needs DriverArgument support being committed separately.
Additional driver arguments: --picturesPerRate for acceleration, --[no]startpaused to do or not that.  Fix typoe.
Random hackage in mfmdha: Invent 'Bar' and 'Mover' Elements, which end up yielding some fairly unexpected long-transient dynamics; break Vector out as conceivably being separately useful for something.