Single slide bug fix
Bower support
README sample with the new naming convection.
Ensure slide selector only takes `<li>` nodes into account as slides

When using templating tools with MVC frameworks (e.g. Handlebars in
Ember), additional nodes (`<script>` tags) are inserted into the DOM
inside the `.slider__wrapper`. These nodes need to be ignored when
calculating number of slides, first child and last child.