FFFF 3.1.2 X-Mas release is here with 30% speedup and SSE2

- Optimized SSE calculation code [GB].
- Added SSE2 support (DualPixel, double precision) [DP].
- Calculation mode keys are changed (see help text), press '0' for GPU calc [DP].
- Minor fixes [DP].

Posted by Daniele Paccaloni 2002-12-23