Make null resolve to null

[benderTheCrime]

Hey there @treycordova, I have a fork of your repo I'm working off of, maybe you can help me implement this https://facebook.github.io/react/blog/2014/07/17/react-v0.11.html#rendering-to-null or implement it in this repo so I can pull it in.

[treycordova]

Hey, @benderTheCrime! I've got a draft up and running in master. (See 89d51a5). Let me know if its output is what you expect to happen. I'm beginning to wonder if appendChildren should be used instead of a <noscript>. appendChildren could be changed to handle a wider amount of cases, like null.

[benderTheCrime]

Looks like that does it!