some fixes to pseudoreals
fixed lexer
pseudoreal variables preliminary
USING and STR$ for pseudoreals
more support for pseudoreals
AND,OR,NOT,INTSR for pseudoreals
EQ,NE,GT,GE,LT,LE for pseudoreals
ABS, SGN for pseudoreals, etc
power24 for all
mul24 and fixes to pseudoreal + and -