fnconvert is a bash script

I decided to bring up fnconvert, because I encountered not "safe" filenames (including diacritics, spaces, parentheses and other stuff) after ripping cd's.
I had to walk through all files separately, removing certain characters, replaces spaces and so on, to be sure filenames were safely sanitized.

Best thing was to automate these tasks. So that was the start of fnconvert.

fnconvert without option will do nothing, fnconvert -a will convert all file- and directory names, fnconvert -v shows the current version