16/03/05
THIS VERSION DOES NOT MAINTAIN BACK-COMPATIBILITY
New mnemonics:
- DADDUI has been replaced by ADDI in order to allow negative constants
- ADDI => ADD 
- MULTI => MULT
- SI => SW
- LI => LW
All the examples included have been corrected.
5/07/05
New feature: Load/Save registers and memory to/from file.
27/07/05
Added new opcodes: SUB, SUBF, OR, XOR, NOR, AND, SLLV, SRLV, BGT
Register and memory forms adapted to autoadjust their width to the contents
Fixed bug in these forms when an invalid format number exception raised