winston out, intel in

So, this replaces our usage of winston with [intel](http://seanmonstar.github.io/intel). Why?

- We get names for our loggers, so that each message has more context as to where it's coming from.
- Much of the logging moves to configuration, making it easier to test different environments.
- My [super-basic-dont-rely-on](https://github.com/seanmonstar/intel/blob/master/benchmark/logging.js) benchmarks indicate 2x faster than winston.
- Uses `WritableStream`'s internal buffering, instead of drain events: https://github.com/seanmonstar/intel/blob/master/lib/handlers/stream.js#L22
- Because :heart: