[Bf-committers] DOF camera parameters.

[Alejandro Conty Estevez]

I have removed filtering from yafray due to the new memory efficient
bucket render method. And to my surprise, some users have complained
because our depth of field filter (zblur) was useful for them.

Some people like Anexus said that despite being a fake, it gives nice 
results very fast. 
For that reason I have proposed to move it to blender, as some kind of
filter somewhere. Does that make sense? I'm just commenting it in case
it is relevant for this discussion.

jandro