Update npm dependencies, fix browserify task

[zpao]

Mostly this is just so we're using the latest packages for all of our dependencies. The browserify update was a bit of work to make sure we actually do the right thing. I started to remove our lodash dependency because it doesn't do much and @sebmarkbage complained. Of note: we need to use derequire ourselves as it was removed from browserify.

Reviewers: @spicyj @syranide

Test Plan: build it, open example, inspect output.

[sophiebits]

Have a diff of the old/new built files?

[zpao]

For react.js - https://gist.github.com/zpao/bd773ac94f934f832dc0. JSXTransformer.js - https://gist.github.com/zpao/e4b0f43a565a48f56baf

and now that I'm looking at the JSXTransformer one, it looks like es3ify isn't actually happening. I guess I'll move it back to an after step instead of a transform...

[zpao]

reverted to using es3ify in after: https://gist.github.com/zpao/5322b74c978ab332f6d6