Properties update refactor needed

[paodb]

It has come to my attention that there's no need to have these properties defined in the Carousel class:

 private boolean autoProgress;
 private int slideDuration = DEFAULT_SLIDE_DURATION;
 private int startPosition;
 private boolean disableSwipe;
 private boolean hideNavigation;

See

CarouselAddon/src/main/java/com/flowingcode/vaadin/addons/carousel/Carousel.java

Line 50 in 34b203d

private boolean autoProgress;

These properties are then used in setter methods and do nothing to update the component. Component will be updated only when calling updateProperties method. The setter methods they should just update the attributes directly in the element as this.getElement().setAttribute(...);

This comes from issue #29.