Fixes

Fixes 23/9 - 23/10

• 65c02 (currently only through command line, not as a directive)
• Now accepts negative numbers, Merlin LUP and MAC keyword support
• Merlin syntax fixes (no '!' in labels, don't skip ':' if first character of label), symbol file fix for included object files with resolved labels for relative sections. List output won't disassemble lines that wasn't built from source code.
• Export full memory of fixed sections instead of a single section
• Option to source disasm output and option to dump all opcodes as a source file for tests
• Object file format so sections can be saved for later linking
• Added relative sections and relocatable references
• Added Apple II Dos 3.3 Binary Executable output (-a2b)
• Added more Merlin rules
• Added directives from older assemblers
• Added ENUM, sharing some functionality with STRUCT
• Added INCDIR and command line options
• REPT
• fixed a flaw in expressions that ignored the next operator after raw hex values if no whitespace
• expressions now handles high byte/low byte (>, <) as RPN tokens and not special cased.
• structs
• ifdef / if / elif / else / endif conditional code generation directives
• Label Pools added
• Bracket scoping closure ('}') cleans up local variables within that scope (better handling of local variables within macros).
• Context stack cleanup
• % in expressions is interpreted as binary value if immediately followed by 0 or 1
• Add a const directive for labels that shouldn't be allowed to change (currently ignoring const)
• TEXT directive converts ascii to petscii (respect uppercase or lowercase petscii) (simplistic)