Improvements for external software renderer

git-svn-id: http://jpcsp.googlecode.com/svn/trunk@3592 4ab978e6-3352-0410-996c-0b42db0051c8
Added tests for alpha mask and shade model in 3DStudio

git-svn-id: http://jpcsp.googlecode.com/svn/trunk@3593 4ab978e6-3352-0410-996c-0b42db0051c8
Implemented alpha test mask (only available with shaders).

git-svn-id: http://jpcsp.googlecode.com/svn/trunk@3594 4ab978e6-3352-0410-996c-0b42db0051c8
sceUtilityXXX: disabled draw speed handling as this is causing problems in multiple applications. Requires more investigation.

git-svn-id: http://jpcsp.googlecode.com/svn/trunk@3595 4ab978e6-3352-0410-996c-0b42db0051c8