Enable building in prefixed Xcode 3
Disable asian fonts for now, they were moved from /System
Fix typo
Keep existing PATH
Fixups for SDL_net on 10.4
Update libpng, do necessary FLAGS munging for pngpriv.h changes
Update all the things!

- Remove outdated png/zlib patch
- Don't use xml2-config, hardcode it for SDK goodness
- Fixup boolean issue in libjpeg
- Define dDOUBLE for ODE
Fix install path on SDL_net
Seriously, don't use @rpath. Also build if SDL.framework is not in /Library/Frameworks
Make ODE double-precision match xmoto
Use new SDLMain.m to work around -psn argument change
Allow specifying SDK by id, not full path
Fix SDL.framework install_name before linking
Require 10.6
More TODOs
Don't autoconf/configure unless necessary
Add chinese font
Update todo
Sanitize path
Remove stale comment