Added osx-instructions
Rebuild of Tesseract and Leptonica for OS X for Lion and Mountain Lion compatibility

I've rebuilt the Tesseract and Leptonica libraries with a '-mmacosx-version-min=10.7' switch that should make them compatible with OS X 10.7 (Lion), OS X 10.8 (Mountain Lion) an OS X 10.9 (Mavericks). I expect that this will fix crashes Lion and Mountain Lion such as #189

I also took the opportunity to move the Tesseract data to within the OS X application bundle so (for OS X) it doesn't need to copied to a temp directory on startup.
HearthStats.net-Uploader now in Retina/HiDPI mode on OS X

Though HearthStats.net-Uploader already supported Heartstone running in Retina mode, the uploader itself wasn't running in HiDPI mode so all the text was pixellated. The uploader is now in HiDPI mode on Retina displays.