Copied tools from virtualagc repos (r613).
Included logic from find_diffs.py to find the source line corresponding to a rope difference.
Fix problems with logic merged from find_diffs.py.
Remove, logic is now in ropediff.py.
Add skeleton for simple prototype AGC assembler.
Add a list to hold the source lines after reading from input files.
Add the Block II instruction set.
Adding more code.
Adding code to handle banks.
Add Context clkass to hold assembler data, and pass to process methods.
Print symtab values as octal.
Add logic for EQUALS.
Add logic for EQUALS, ERASE, BLOCK. Improve SymbolTableEntry __str__ method. Check opcode type against current mode.
Bunch of changes.
Redo memory map code. Add BankDescriptor and SymbolTable classes.
Ignore backup files.
Add symbol table extracted from Artemis072 listing temporarily for testing of agcasm.
Add MemoryMap class, with address conversion methods. Add verbose option. Replace sys.exit calls with use of Assembler.error().
Merged changes from Linux.
Checkpoint:
 * added string methods
 * more work on memmap methods