Started new article "handleEvent"
* handleEvent
* Web Components Explained
+ 'about es6 arrow functions'

sources:

http://www.nczonline.net/blog/2013/09/10/understanding-ecmascript-6-arrow-functions/

http://people.mozilla.org/~jorendorff/es6-draft.html#sec-arrow-function-definitions
Merge pull request #3 from termi/handleEvent

Handle event + about es6 arrow functions