Picopt

- Fix -Y to actually disable not enable type conversion

- Fix typos in --help

- Packaging for PyPI
- Internal changes to make picopt more modular and library friendly
- CHANGED COMMAND LINE ARGUMENT LETTERS.
- Added verbosity setting
- Truncated relative and in-archive path names for readibiliy
- Nag about animated gifs less

- Fix error on no directories

- Added multithreaded jpegrescan operation when picopt isn't using up all the
cores at the suggestion of Alex Roe.
- Added destroy metadata option at the suggestion of Alex Roe.

- Added to ArchLinux by Alex Roe.