Assembler

- Fix RK to work with constants larger than 2^8.
- Add following command line options:
  - endianness;
  - size of string constants;
  - size of ints;
  - type of lua numbers.
- Insert line counter to improve error messages.
- Add operator '...' to allow the definition of vararg functions.
- Add following instructions: JNE, JG, JL, JGE, JLE and JE.
- Add below constants/parameters if necessary:
  - TRUE;
  - FALSE;
  - NIL.

Disassembler

- Make it work with big endian code.
- Write '(...)' instead of '(0)' when a function is vararg.