Blender Git Loki

Particles effector type #define
Different draw mode for Vortex effector ( http://www.clubinfo.bdeb.qc.ca/~theeth/Temp/vortex.jpg )
Use row buts for effector type (only one effector at a time per object).
Forcefield circle transparency in 3D view is controlled by falloff value (for coolness factor).

Please note that those only draws in the 3D view for Empty objects. I've tested with all other object types through a global call, but lamps (and only those) give problems. Since we go in release status soon, I prefer commiting something that works all the time.