FlexxCpu version 05 rev. D released

This is a minor update.
There was a problem about the reading of the video memory, it was fixed.
The MOV opcode has been changed with name STM as the opposite to LDM.
Now we can write the assembly instruction without " , " after the opcode name, for example:
we can write: "MUL Y , 80" or "MUL , Y , 80" indifferently.
bye