v1.0.0 dev

This branch reflects the upcoming 1.0.0 release (it's time for that!).

What this branch does:

* [x] move the parser/generator of packets to a separate module [mqtt-packet](http://npm.im/mqtt-packet).
* [x] integrate the new API for servers #145
* [x] support all TLS options for servers.
* [ ] deprecate `createServer` and `createSecureServer` #231 
* [ ] deprecate `createClient` and `createSecureClient` in favor of a generic `connect`.
* [ ] prepare new mqtt command line tools.
* [ ] integrate [mows](http://npm.im/mows).
* [ ] update README

Closes #137.