[Bf-cycles] Porting Blender Internal Environment Map feature to Cycles (with name change)

[Przemyslaw Golab]

Hello,

Feature request. In Blender Internal renderer there is nifty feature
to project environment on object with an option to save this map as a texture.

The tool is located in Blender Internal Textures > Environment Map >
Environment Map Sub Panel.

Looks like this:
https://dl.dropboxusercontent.com/u/31390469/Image%20Bin/Selection_177.png

and here is a small video tutorial which explains how it can be used:
https://www.youtube.com/watch?feature=player_detailpage&v=QLPYOn7RS8Y#t=48

I would also suggest changing the name to Environment Projection/Probe
or something close.
When I was talking about this feature on IRC everybody confused it with
Environment Texturing and it's something opposite to it :)
You Texture object with environment surrounding it, not environment
with a texture :)

I was able to do it myself with panorama camera, environment texture
and new baking features in Cycles. But it's a lot of tedious and
tricky to set-up repetitive work, that adds up more if you iterate
with tweaks and changes and I had to create additional worker scene
for projection baking part. In Blender Internal it was nicely automated.

Regards,
n-pigeon