v002 Rutt Etra performance update.

v002 Rutt Etra 2.0.1 is out, which gives a non-trivial performance increase over 2.0. Integrated graphics users will see a performance increase, but users with dedicated GPUs should see an even larger increase in performance due to support of optimal floating point formats.

With 2.0.1 I am able to now run twice the resolution at 60 frames per second over 2.0 on my 3 year old Mac Book Pro.