Added iris folder
Started migrating iris to an 8 bit arch
Deleted platform.s

Irrelevant
Updated the iris processor to be 8-bit
Implemented new instruction set structures
Trashed all old phoenix code
Added getregister and putregister
Added Longjump support
Simple compare implementation
replaced chain mode with long mode for move
Implemented the basic move operation

I also streamlined the different move modes. I eliminated the register to
immediate move because it doesn't actually make any since with a 16 bit memory
space.
Eliminated the upper "store" registers

These overlays no longer make sense with a 16-bit program space. So I doubled
the register count to 8 instead.
Implemented basic arithmetic operations
Fixed up instruction alignment and sizes
Got a basic working version of iris
Removed debugging flags from mkfile
Added panic function

Also removed the check to make sure that the register index in get and put
register are greater than zero (they're unsigned...).
Eliminated compiler warnings
Updated the README
Updated processor.c for bit range testing