Changed configure.ac and the files for automake to handle building and installing...

Changed configure.ac and the files for automake to handle building and installing the Mac OS X version.  Mostly matches what's in 2.2.1.7 with the notable excetion that set USE_TRANSPARENCY, SAFE_DIRECTORY, and VERSION_STRING in configure.ac for the Mac version (USE_TRANSPARENCY isn't used in 2.2.1.7; the others could be but currently aren't used there).