changed html title to three.js webgl - collada exporter and renamed the file from webgl_geometry_teapot_collada.html to misc_exporter_collada.html

adjusted collada export shader elements to follow the collada standard, changed material to get number of materials from the material array instead of the empty geometry.groups array and added an example for the changes

MeshLambertMaterial does not have shading properties thus leading to a warning in the console.

name change

Show suggested best practice for managing a scene.

Removed stats and animation loop, since scene needs update only on
input. Fixed mesh memory leak.

Changed to BufferGeometry object, avoid a number of unnecessary allocs,
flat face cleanup.

I won't reformat "-5.3" to be "- 5.3", etc. I didn't bother adding
spaces in the giant arrays of spline surface data.

Add the Utah teapot geometry object, along with a demo showing its
options. Also fix Matrix* documentation: match current constructor code,
and clean up style.