NAN 1.0.0 for Node 0.11.13 support

This is incomplete, there's a couple of things I haven't managed to do yet.

@kkoopa, would you mind having a look? I'll add you to my fork so you can mess around in this branch if you have the time.

Specifically I'm not sure the best way to deal with the lack of `*String::AsciiValue` now, and also making a `Local<Value>` out of a `Local<Object>` for an `argv` array in a cross-version compatible way.