Add -Wno-deprecated flag to silence XCode 5 GLUT deprecation warnings
Fix clang compilation by adding unistd.h include
Disable clang warning about unused arguments in snprintf() call
Switch back to using /usr/bin/atos over xcrun atos, avoid freezing of target process due to new 10.9 / XCode 5 atos tool. Will require a better solution in the future to avoid using deprecated atos tool