When multiple morphTargets where in the same scene, this optimization resulted in a mix of morphTargets from different animations with different sizes.

WebGLRenderer: major ID collision issue fix

Support Sector of CylinderGeometry

Improve ability to detect the format of a STL file

Minor cleanup of the Python package.

Moved exceptions and logger to the root of the package scope. This is to make these modules more accessible to the upcoming importer.
Added some error logging where exceptions are also raised.
Logger no longer assumes the file name. Sub-packages (exporter, importer) will define this name upon init.
Performed some code cleanup in exporter/geometry.py.

For some reason, few binary STL files will have larger size than the value calculated based on metadata, causing them to be recognized as ASCII ones. To detect those files, a byte-by-byte check loop is added, it tries to find a non-ASCII character byte, if any is found, this file will be recognized as binary format.

The additional checking process slightly affected the loading time of ASCII files, for example a 78MB ASCII file will need 3 more seconds to go through the loop using a computer manufactured in 2012. However most mesh in this size will be encoded in binary format, so large ASCII file is uncommon.

Fix Blender UV export for BufferGeometry

Added drawcalls example for buffergeometry

Update Creating-a-scene.html

Optimize TessellateModifier.js slightly

`.distanceTo()` -> `distanceToSquared()`

Various Math improvements from Clara.io

add docs per @WestLangley's request: https://github.com/mrdoob/three.js/pull/5788#issuecomment-67857995

remove Matrix4.makeShear per @WestLangley here: https://github.com/mrdoob/three.js/pull/5788#issuecomment-67852744

editor: add fullscreen mode