Release: GL Tools, v1.3

This build of GLTools fixes numerous bugs with Snow Leopard compatibility, and some PPC bugs on Leopard as well. Some minor performance improvements were made, as well as other minor bug fixes.

Some new private patches were added/modified -- they're still private, so please don't expect them to remain compatible/unchanged in the future.

Please be as clear as possible with bug reports (include sample compositions, descriptions, steps to reproduce, etc.) -- we're rather backlogged at the moment, so saving us a few minutes here and there helps a lot.