whitespace fixes
trace macro
weak SystemInit
provide INSTBASE for comparison with cell, also fix (un-)signedness!!!
add instruction and stack trace via printf
rename local
strings are not unsigned chars
fix ambiguity in stack operation
'find' tracing
fix decl
comment out catch stack for now (unused)
default interpreter program retsub -> quit
fix undef instruction debug print format to hex
add support for calling primitives after finding them