[Bf-committers] Add-ons: Add a license to bl_info

[Aaron Carlisle]

Hi,

Since add-ons have been widespread coming from hundreds
of authors and different location, it would be nice to communicate
how they are licensed. I think for 2.8 we should add a license to the
bl_info.
What do other people think?

-- 
Aaron Carlisle

Project administrator for the Blender 3D Documentation Project
Email: carlisle.b3d at gmail.com
Website: https://blendify.github.io