[PD-dev] [GEM] CVS commits (again)

[chris clepper]

as mentioned in the previous commit post, a test object for 
blending/AA has been added to CVS

Geos : square
- added a blending function
- allows for transparency by changing the alpha via the [color] object
- also added anti-aliasing
- [blend 1/0 (  enables/disables both blending and AA.  disabled by default
- not all video chips recognize or even like these functions

the attached patch is for testing.  please test and report findings 
with various OS and GPU combinations

thanks for your time,

cgc
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