Blender Git Loki

BI Viewport(GLSL): support for envmap in Texture node

This patch is another step to achieve BI and it's Viewport consistency for cubemap textures.
{F318879}

To test world_space_shading flag D2072 is required.

Alexander (Blend4Web Team)

Reviewers: campbellbarton, brecht

Subscribers: homyachetser, Evgeny_Rodygin, AlexKowel, yurikovelenov

Differential Revision: https://developer.blender.org/D2074