Include stdio.h. It was sneaking in through png.h
If you ./configure --without-libpng then stdio.h was not getting
pulled in, but is required in the jpeg code. Ensure it comes in.
Add a Unix style man page
and the automake rule to install it
Mention -f flag for formatted output
I'm not sure if the csstidy comments are still relevant.
Maybe it does more, maybe it doesn't. I left them in.
Merge pull request #12 from jimstudt/jpegincludefix

Include stdio.h. It was sneaking in through png.h
Merge pull request #13 from jimstudt/docs

Documentation updates