No longer needs 'dword' as an argument

All calls to getMemory and setMemory will always assume a dword
Added support for more instructions

the list is now sleep, pop, push, jmp, call, rjmp, rcall, mov, swp, not,
ifeq, and add
Update README.md
Changes:

- User error display
- More instructions
- PC is now stored in memory
- Bug fixes