pre-release made in Dec. 2013):
* Fix OS X 10.9 issue of current directory set by Finder
to something else than folder where app bundle resides.
* Some Mac OS X build / project changes & updates.
* Adjustments to Mac OS X fontconfig config file, to avoid warnings
and make things more robust.
* Updates to some #include's to catch up with newer library revisions.
* Tweaks to pixel read/write on Apple.
* Introduction of 'intprt_t' casting to avoid warnings on x64.
* Some additional debugging output.
* Logging stderr & stdout to /tmp/tuxpaint.log
Untested (I don't have a Mac!)
