Blender Git Loki

Smoke:
a) Crash fixed when loading files with smoke
b) changed presets to be more low-cpu friendly
c) smoke looks thicker

Unsolved:
a) 3dview of smoke changes weirdly when looking at front/back. Just move around a cube with smoke and you know what I mean - odd shading. If someone likes to take a look: draw_object.c -> search for "smoke" there