UnrealBloomPass support?

[neciszhang]

UnrealBloomPass : https://github.com/mrdoob/three.js/blob/dev/examples/js/postprocessing/UnrealBloomPass.js

[neciszhang]

If can't add UnrealBloomPass effect, How do I use UnrealBloomPass in the EffectComposer component

[v1rtl]

@neciszhang please scroll in the bottom of api.md file for instructions on adding a new effect

would also be cool if you pull request a new effect

[benrugg]

Just bumping this. It would be awesome to get UnrealBloom support!