add 'replay' command log feature: no mouse interaction during replay, and use a fixed number of sim steps in stepSimulation.

workaround for reversed separating normal in gjk/epa when using very small shapes, detect case and revert normal.
use smaller world size (10 units versus 100) for higher resolution shadow map
use a hard-coded rolling friction of 0.2 for objects in physics server (will make this configurable)
fix loading of command log files, when platform features are different (64bit/32bit)

examples/OpenGLWindow/GLInstancingRenderer.cpp

@@ -19,7 +19,7 @@ subject to the following restrictions:
 bool useShadowMap=true;//false;//true;
 int shadowMapWidth=8192;
 int shadowMapHeight=8192;
-float shadowMapWorldSize=100;
+float shadowMapWorldSize=10;
 
 #define MAX_POINTS_IN_BATCH 1024
 #define MAX_LINES_IN_BATCH 1024