Added filter options:
- dot (replace leading dot with _)
- posix (replace illegal chars in *nix OSes with _)
- vfat (replace illegal chars in VFAT filesystems with _)
- whitespace (replace all whitespace chars with _)
- printable (replace all non printable ASCII chars with _)
Removed filter options:
- fat (replaced with vfat)
- special
Fixes#313.
Signed-off-by: JoeLametta <JoeLametta@users.noreply.github.com>
