Node promises tutorial

This is a step by step tutorial, how to use promises through an example.

Ignac is an ordinary person, who does the same things every morning. Through his every-day activity we can easily understand how promises work.

Branches

1. Simple sync sequence
2. Sync sequence with callbacks
3. Async sequence with callbacks
4. Promise, resolve, reject, callback, etc...
5. Embed promises
6. Promise chains
7. Promise chain with catches