Honeymoon with file structure over

Now that I understand more about how the file/folder structure works
(and how relative and non-relative imports work), I realized that it
was silly to make folders of some of my modules. They don't have
submodules, which means the folders contained only __init__.py.
Silliness! So I reverted them to plain files.

I also moved the one music file into a brand new resources/music/
folder. Consistency!
Massive Code Cleanup

Reducing lines, taking out function that have ceased to have functions,
improving style, etc. More yet to be done.