* build.js ux improvements

- script can be run from any directory, uses script dir to determine
  relative paths to other needed files
- by default, determine minified file name from `output` file name (e.g.
  three.js -> three.min.js). minified file name can be explicitly set
  directly via a new option `minifiedoutput`
- if `minify` is true, still build un-minified file
- ensure sourcemap url refers to actual minified file name, (before,
  three.min.js was hard-coded)

* updating npm scripts with new build script usage

* fix set automatic .transparent NodeMaterial

* minimalist optimization

* Update index.html

* Revert "Update index.html"

This reverts commit 76f47860891b9bc87b0243ec79378d325a725650.

* added options for gammaInput and gammaOutput

* added storage for gammaInput and gammaOutput

* added gammaInOut values to json export

* further adds

added gammaInOutput options to the app and fixed them not loading on
page reload

* dang that was wrong

JPEGs can't have an alpha channel, so it's optimal to load them as RGB
textures instead of RGBA. This saves 25% of texture memory on
OpenGL-based WebGL implementations. The optimization is especially
significant on memory-constrained mobile platforms.

* fix(blender-exporter): Animation._parse_pose_action now returns only existing keyframes,  Animation._find_channels returns all channels
fix(animation): AnimationClip uses id instead index

* fix(blender-exporter): Animation._parse_pose_action scale order

Revive  "view-source" support and add a catch and try statement if "view-source" is not available. Note: the relative path on view-source is not working, it has to be a full url for it to work...

* Add 'normalized' bool and accessor to BufferAttribute array in InterleavedBufferAttribute

* Add webgl_buffergeometry_points_interleaved example

featuring InterleavedBuffer with different numercial type (float32 and
uint8)

* Change to match BufferAttribute syntax

`value[ 1 ] === 0` is repeated. Looks like it should be `value [ 2 ] === 0` the second time.