Need to sanitize folder/file names

[along1x]

Some categories from FRED include semi-colons in the name. Because of this, Windows users can't clone this repo.

If you run the full file path through some simple regex to remove invalid characters before saving any files, it would remediate the issue. Discussions of how to do this can be found here: https://stackoverflow.com/questions/295135/turn-a-string-into-a-valid-filename