[BGE proposal] Set default envMap resolution to 512x512

Hello! It would be cool to change the environment map render default resolution (600) to 512 (to make it compatible with this script: http://en.wikibooks.org/wiki/GLSL_Programming/Blender/Reflecting_Surfaces )

What do you think about that? I think it’s easy to make such a patch…

I’ll make a query in https://developer.blender.org/maniphest/

EDIT: myFirstPatch :smiley: : http://www.mediafire.com/download/zgt2d42qtiwdc38/envMapResolution.diff