MoxingBoxes jQuery Plugin

Changelog

(Only the most recent changes are shown below, see the wiki page for a complete listing)

Added preinit callback/event
- This event is triggered after the basic MovingBoxes structure has been established
- It occurs before the initialized event.
- Using this event allow for modifying the struction without any initialization delay.
- See issue #68 on how use this event to add inline navigation arrows.
Modified the navigationFormatter option:
- Navigation links are now wrapped by a span with a class of "mb-links".
- The contents within the wrapper are removed and updated every time MovingBoxes gets updated.
- The wrapper was added to allow prepending and appending navigation arrows, see issue #68.
- You can now apply attributes directly to the navigation link as well as modifying the contents; this allows for adding tooltip titles or other data attributes.
- Please refer to the documentation for more details.

Clicking on the side panels that are completely wrapped in a link should no longer open that link. Attempt to fix issue #67.