Removes selectors property (not suited for nested sliders)
Improves styles for nav dots in examples

Fixes a bug when sliders are nested
Changes updateSlideVisibility to run on layout event

Adds some development assertions for invalid states
Improves gesture swipe handling (still experimental)
Reads panel styles on loading event

No need to wait for images to be loaded. Styles
should be ready when the slider is initialized.
Relocates slidepanels prepare step to loading event
Adds newest ocbnet layout manager for nested instances

A major re-work of the event handling had to be done. This
may break for some configurations. Needs more testing.