Overwritten THREE.Geometry.clone for THREE.TubeGeometry to fix #7301

add read float buffer example

Added missing dependencies for sae3d examples.

http://zz85.github.io/mrdoobapproves/

Removed shading property for MeshNormalMaterial

the example reads the background texture point under the mouse and
displays the value on the window.

@nraynaud do you mind double checking that I didn't break anything?

Make readRenderTargetPixels() compatible with float extensions

Updated to latest Raycaster.params

Minor cleanup in postprocessing glitch example

Minor cleanup in extrude splines example