Presentation made for Meet.js Wrocław, July 2013.
You can re-use it. Just give me credits at the very end.
Based on Redemption from Callback Hell presentation available on YouTube.
Thank you guys! You've inspired me so much.
References:
* http://www.youtube.com/watch?v=hf1T_AONQJU
* http://domenic.me/2012/10/14/youre-missing-the-point-of-promises/
* https://github.com/promises-aplus/promises-spec/blob/master/implementations.md
* http://brianmckenna.org/blog/category_theory_promisesaplus
* http://thanpol.as/javascript/promises-a-performance-hits-you-should-be-aware-of/
* http://blog.parse.com/2013/01/29/whats-so-great-about-javascript-promises/
* https://github.com/then/