Browserify transforms support

[guybedford]

This needs to be investigated for feasibility.

[guybedford]

Also investigate how asset files like css are supported through browserify transforms for replicating this.

[trusktr]

This will be really cool. One of the main things I'd use this for is to apply glslify onto WebGL shader files. Glslify adds CommonJS-style imports/exports to GLSL files.

[trusktr]

Support for Webpack loaders might be cool too.

[myitcv]

👍 on the back of plotly/plotly.js#22

[guybedford]

This seems like it isn't going to be a huge priority as browserify transforms aren't that common.

[trusktr]

@guybedford Browserify has 2,190,020 downloads in the last month, so it seems browserify transforms would be fairly common when compared to any other build tools plugins.