Implemented Several Missing Parts of "MFLib" and co.

As mentioned in v0.0.1's edit, I forgot to implement part of the "Mobile Framework" portion of the source. In particular, the higher-level virtual input functionality, additional software floating-point, and several small general-utility functions.

This version holds the initial source code after this work was completed. Previous goals still apply, although now I'm wary of other files I've forgotten.

Most Files Have Initial Implementations

This marks the point where I will start implementing/porting the remaining ~24 boss files (Sub-modules of 'sonicgba').

These ~24 files were specifically ignored until all other files were properly handled.

When these files are finished, the next steps are debugging and testing.

This is not a formal release.

EDIT: I forgot a few "MFLib" files; these will need to be ported first.