Remove leading characters in file names

Renames all files in a folder to remove one or more unwanted leading characters

RemoveLeadingCharacters.m
Renames all files in a folder to remove one or more unwanted leading characters
Example:
03-song.mp3 is renamed to song.mp3 while anothersong.mp3 remains anothersong.mp3
MoveLeadingStrings.m
Renames all files in a folder to move a leading string to the back.
Example:
artist-song.mp3 is renamed to -song-artist.mp3

This could easily be rewritten to search for files recursively using Kelly Kearney's subdir.m.