[ANN] New article on using callbacks in Reef

I just published an article on using callbacks in Reef framework. 

You can read it here: http://smallworks.com.ar/en/community/Reef/reefSimpleTutorialPart2

I know, it is very delayed with my latest promises, but there are a "deadline collision" with this and Reef documentation it's coming out as soon as possible :)

well... enjoy and any observation is really well-welcome. 

best,

Esteban