Large bundle of OS X tweaks by Eric P. (basis of the 10.9-compatible

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!)

src/parse.gperf

@@ -13,6 +13,7 @@
 #include <ctype.h>
 #include <stdint.h>
 #include "../src/parse.h"
+#include "debug.h"
 
 const char PARSE_YES[] = "yes";
 const char PARSE_NO[]  = "no";
@@ -188,8 +189,10 @@ void parse_one_option(struct cfginfo *restrict tmpcfg, const char *str, const ch
   unsigned offset;
   char *dupecheck;
   const struct cfg *cfg;
-    
-  //printf("parsing: <%s> <%s>\n",str,arg);
+  
+#ifdef DEBUG
+  printf("parsing %s: <%s> <%s>\n", src, str, opt);
+#endif
 
   if(isdigit(*str))
   {