[Gm2] standard procedures in gm2

[rob solomon]

PIM defined several standard procedures that are not part of SYSTEM and 
are not clear to me that are part of gm2.

ABS, CAP, CHR, DEC, DISPOSE, EXCL, FLOAT, LENGTH, HIGH, INC, INCL, INT, 
MAX, MIN, NEW, ODD, ORD,
SIZE, TRUNC, VAL

Now that I got past the crt linking issues, I can actually use this 
compiler.  It took me years to realize why gm2 did not work for me.

Thanks,
Rob