Use EXT_color_buffer_float to support blending from our render texture, using format=RGBA and type=FLOAT ...

Need to update PIXI to support RGBA32F (new build in pixi.js-504.tgz, needed to delete package-lock.json)
Still seeing problems with the framebuffer (it's complete, but no rendering?)

Fixed the imgui project so we can do a dev (incremental) build and a distribution build

Start prepping for dev SystemJS build

Do all the building with the typescript rollup plugin (and ignore the cache folder for that). Include the node builtins plugin, and update imgui-js to fix the bad module references to imgui-js

Try using rollup with plain es2015 modules (commonjs for bind-imgui)

Very simple setup with systemjs. Doesn't load modules, doesn't rollup yet

Start work on implementing the 7gui exercises with typescript and a webgl IMGUI