Initial materials
Documentation material browser
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
Added new 'world' methods
WebGLRenderer: Delete __*Buffer after issuing _gl.deleteBuffer(). Fixes #5421.
WebGLRenderer: Set _currentGeometryGroupHash to -1 after deallocating geometry just in case (temporal hack). Fixes #5421.
WebGLRenderer: Clean up.
Updated builds.
WebGLRenderer: More buffer deletion.
Updated builds.
WebGLRenderer: Extensions code clean up. Need to refactor this so we get the extension only when needed...