DefineActor, PositionalMessageSend, ... and function selection support

[Jinmo]

I hadn't reverse engineered it deeply, but DATA_OFFSET variable of disassembler.py is related with the function index. In addition, I feel like it should be changed to negative offset I think, because with DATA_OFFSET = 2, *ctf one did not show the main function, but it showed the hex encode function.

After changing the variable to 3, it worked with literals support.