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.
Updater no longer dumps instructions in /Applications folder

A file called instructions-osx.txt was being saved in the /Applications folder (or wherever you store your HearthStats.app) that shouldn't be. The file was intended as instructions for people downloading the first time, but it was also being extracted during updates and placed in that folder. I've changed the updater to exclude that file when updating an existing copy of HearthStats.
Updated for v0.15.201403101
Merge pull request #194 from gtch/master

Support for OS X 10.7 Lion and 10.8 Mountain Lion