Add CFLAGS/CPPFLAGS for compiling Pillow on OS X 10.9
Add CFLAGS/CPPFLAGS for compiling Pillow on OS X 10.9

lucacorsato/feincms-in-a-box,lucacorsato/feincms-in-a-box,lucacorsato/feincms-in-a-box,lucacorsato/feincms-in-a-box