[PD-dev] [GEM] CVS commits

[chris clepper]

Over the weekend I added a test Altivec function to pix_add.  There's 
an #ifedf wrapped around a call to the processYUVAltivec() function 
in the standard scalar routine.  After trying a few things this seems 
like a fairly simple way to implement Altivec and MMX.  Can someone 
check the compile on Linux and Windows?

Also, there is a new object: pix_mix.  It mixes two images together. 
Try it out, and have some fun.

cgc