parser.py: Adding mod implementation to grammar
simulator.py: Implementing mod opcode
parser.py: Adding div float to grammar
simulator.py: Implementing div float instruction
examples/: Removing all pascal examples except for assignment.pas
parser.py: Parser now works for OR
simulator.py: Implemented or op code
examples/: Adding pascal file for testing logic operators
parser.py: Extending grammar to parse xor
scanner.py: Adding xor token
simulator.py: Simulator can now execute xor