Pred-prey instruction cleanup in cHardwareExp.
MGE hardware moved to MBE (and MGE removed).
Moving previously public instruction helpers in hardware to private.
Corrections to group attack recently modified return approach.
Fixed constitency issue with legacy predator-prey attack code (order of register value settings).
Removing much of the use of magic forage target ints for differentiating predators and prey.
Merge branch 'master' of git://avida.devosoft.org/avida-core