[Mesa-dev] mesa/gallium: integer support

[Dave Airlie]

These are 5 more patches in the integer support set, the first just
adds a pack int routine, the second fixes up the texture format picking.
The 3rd adds all the gallium formats I've needed so far, we may require
R8G8B8X8 formats as well, I need to write more tests. The last two
patches add state tracker support for integer texture format picking
and to the readpixels path.

Dave.