Fix WireframeHelper for BufferGeometries without offsets

by just creating a dummy offset
fix coding style
Improved documentation of ShaderMaterial and RawShaderMaterial
Continue documenting properties/methods of ShaderMaterial
Implemented cross-referencing functions for members
Implemented example cross-referencing from docs
Modified documentation regexes so that link titles can contain spaces and anchors
Add examples of cross-referencing in BufferGeometry
renamed offsets into drawCalls
typo fix
Allow DataTexture to be used as cube map.
Merge pull request #5418 from tstanev/autodesk/cube_data_texture4

Allow DataTexture to be used as cube map.
build.py: utf-8 backwards support. Fixes #5416.
WebGLRenderer: Minor code clean up.
Updated builds.
Added new 'world' methods
Editor: Removed uneeded flag.
Editor: Clean up Menubar.Edit.
Removed all remaining buffersNeedUpdate flags.
Updated builds.