Tool to re-encode raw resource binaries back into bank files

[felipesanches]

We need a tool to re-encode raw resource binaries back into bank files to be used with the original MSDOS engine.

This script would be called resources2banks.py and would do the exact opposite of our existing banks2resources.py script.

A good test for it would be round-tripping both scripts to ensure nothing is lost in the process. Another good test would be to extract resources, make some trivial modification, reencode it into banks and then observe the modified assets being used on the original msdos release of the VM.