Added Mac OSX Support

The .pro file was tweaked slightly to be a tad cleaner and right now
has unix only lib and include paths. I will be adding support for other
OSes shortly.

The MuPDF library had to be built SEVERAL times. When it was finally
compiled in x86_64, then MuPDF-QT needed to be built, but was very
picky about how it was compiled. Building it along side CORAL fixed the
architecture errors, and building the library inside of QT-Creator
fixed the library. I think the CMake on Mac didn't play nicely with
mupdf.

The program crashes immediately on mac simply because I don't have a
PDF to test on this machine, but I'm sure it works.