Introducing the new decoupled controller and transition logic

The logic of slides control and transition was extracted in your
own classes.

This way the maintenance become more easy and the modularised behavior
allow in the future to the other developers create your own transitions
strategies.
Code style adjuments
Removed the unused config
Using the sufix “Selector” in selector config keys
Refactored the slider code
Using a CSS class to select the slides inside the slides container

Isn’t always that developer want use the UL>LI for slides, so, using
the .slide class seems better for many uses.
Adjustment in example

* Using two spaces for identantion
* Everything in english
* Slider markup without lists
Implemented the slide transition strategy
Javascript code moved to example page bottom
Added the possibility to use custom transition strategies
Using word “interval” instead of “speed” for the transition interval
Added the listeners for next/previous slide triggers
Added the infos header in the main js file
Translated and updated the README