modalframe 6.x-1.1

Changes since Modal Frame 6.x-1.0:

• Bugfix: load jQuery UI core on child windows to get access to tabbable elements.
• Bugfix: fully rewritten method to deal with tabbable elements in child window.
• Bugfix: fully rewritten methods to compute dialog size and position.
• Bugfix: enhanced clean up code to help browsers deal with memory leaks.
• Bugfix: enhanced support for autoResize option. Also, enabled this option in example module.
• Bugfix: removed a few snippets with IE dependencies present in previous version.
• Bugfix: make sure modalframe_close_dialog() cannot be invoked more than once.
• CSS simplification: remove class .modalframe-loading, background moved to #modalframe-container.
• CSS change: opacity effect increased from 0.3 to 0.4.
• #476004 reported by bangpound. Remove jQuery Update requirement.
• Changed description of example module (s/module/API).
• Minor changes in inline code documentation and coding style.

TODO:

• #477194: Prevent child navigation from affecting parent's history