computeOffsets to change default size based on ext

uv2 fix

Reset GL state before rendering sprites and lens

Apply ambient occlusion to ambient light sources only

Clean up Lambert shader

Change default size based on OES_element_index_uint extention

Removed AOmap and Lightmap from Basic and Lambert

Support 2nd set of UVs in BufferGeometry:fromGeometry()

Removed wrap lighting from Phong and Lambert

rendertarget resizable

Add defines for glsl functions

drop current rendertarget when resized; will be recreated in next render

Glsl improvements

TO DO: *NeedsUpdate, CustomAttributes, Skinning, MorphTargets.

Fix for Firefox WebVR

Remove unneeded function calls, rearrage for fused multiply–add, remove
excessive shader whitespace

Clean up phong shader