Separated panel properties into @panel and @settings and now update @panel on each Panel when the underlying data changes.
updatePanel call now updates now waits for async callback before ending editing.
Simplifies code creating the initial panelManager.
Adds the WebPanel

This panel let's you load any URL into it. Behind-the-scenes it just uses a simple <iframe> with a transparent <div> on top of it to preserve panel dragging.

Because this works basically the same way as the Do-it-Yourself option in Panic's StatusBoard, many StatusBoard URLs will work here.