FlashForth V3.81

• The configuration file p18f-main.cfg syntax changed
• HI prints the highest available address for each memory type
• <> returns well formed flag
• Quad and triple precision math words in qmath.txt
• .FREE prints the available free memory of each type.
• Default return stack save area increased to 31 cells.
• ?ABORT logic inverted due to alignement with standard forth.
• Error messages ALREADY DEFINED and COMPILE ONLY.
• Write to unimplemented flash prevented. This prevents USB PICs from hanging.