Major feature improvements

Added FTL resource folder auto-detection for all operating systems.
Added drag-and-drop reordering.
Added "Toggle All" button.
Added logging.
Centered the main window.
Included readme, ini, and ftldat.py in the repository.

Dats are unpacked to temp folders and deleted after patching.
Both *.ftl and *.zip files are referenced by entension-less names.
GMM stays within its own dir (which can be anywhere outside of FTL/ now).