Enable lossless by default.
- no need to specify ll=1 for lossless anymore.
- still honors ll=0 to disable.
Adds in EXIF Stripping.
- So, as an FYI, this is sorta security thru obscurity if the
  orginal image is accessible to everyone, since the end user can pull that and scrape it
for EXIF data.
- closes https://github.com/tedconf/crushinator/issues/1