Suggested new compile flags for Mac OS X (at least for 10.9 Mavericks)

* Please know this is a bit of a black box and only via the grand oracle google, right hand lackey stack overflow, and various other articles, I think the one compiler flag I added and the suggestions for compiling on OSX are now correct.

* Also note that if the warnings I'm getting are correct, the min version of CDDA might now be OS 10.7 on Mac. Someone who is more mac knowledgeable (I'm sort of a Mac user because I need to be, not because I spend time building mac programs) might know how to compile to less than OS 10.7.

That said, it works for me, and I can get back to playing the game, enjoying new content, and trying to fix bugs. (Historical note: I'm using OS 10.9 (mavericks)).