Reworked colour processing.
Improved type safety when generating random numbers.
Refactored DragModifier to account for particle mass and drag coefficient.
LinearGravityModifier now accounts for particle mass.
Vortex modifier now has adjustable maximum speed.
Added container modifier.
Added hue interpolator modifier.
Added velocity hue modifier. Changes the hue of particles based on their velocity.
Added box fill profile.
Added box profile.
Added circle profile.
Added static accessors for new profiles.
DirectX9 point sprite renderer now automatically finds offsets for vertex declaration.
Updated sample application.