This back-end has been deprecated by Apple for a while, and has not been used in Panda. As we will no longer be supporting 32-bit macs going forward, and the Carbon windowing API is not available for 64-bit mac, there's no point in keeping it.
Adds ability to register "obsolete" names for certain types under older .bam versions, so that we are still able to write out old .bam files.
Fixes#347
It was an incomplete experiment for distributing rendering pipelines over
a LAN of computers all working in concert.
Who knows, it may return someday. Until then, it's best not to keep it
around.
rdb
Sam Edwards