Adds ShaderMaterial properties to trigger inclusion of extensions

attempt to simplify the phong shaders and lights.

Point size attenuation fix applied to all examples that had the wrong approach hard-coded

Bugfix intersectsPlane and new unit tests

Updated webgl_animation_skinning_morph example.

Press play on tape.

Fixes size attenuation calculation for GL points

Add plane/box and plane/sphere intersection test

OrbitControls: adding a mouseout listener which does exactly the same…

Math: Less mormalization error in Quaternion.slerp.

Animation: Interpolants & extensibility overhaul.

The calculation for perspective-based size attenuation of GL points was wrong; the scale should be entirely based on distance in the z-axis relative to the camera. This change makes points fit perfectly with identical quads in the same scene (where previously the point size would nonsensically shrink towards the sides of the image). A comparison can be seen here: http://imgur.com/a/G3sJ7

Ignore empty entries in MTL files

add 3MF Loader