Cannot require node's util module

[lazywei]

I got this when trying requiring fluxxor on react native.

I thought util module should be part of node js and I don't need to install it manually.

[lazywei]

It seems this is duplicated of #375
So React Native doesn't (and won't) support node runtime, right?

[glenjamin]

These might help: https://github.com/substack/browserify-handbook#builtins

[amasad]

For now, it should work if you do npm install util. Let's track the issue here #447