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
Quaternion, Vector*: Added offset to fromArray()
Fixed ortho interactive example window resize.
Updated fromArray() usage.
Updated builds.
Completed half of curve documentation
Updated examples that could use PlaneBufferGeometry.
Using GridHelper instead of PlaneGeometry in sound example.
WebGLRenderer: More code cleaning.
Updated builds.
WebGLRenderer: Reset _currentGeometryGroupHash at the beginning of the frame.