YUI Loader

Adds dynamic loading of YUI and external script and css files.

Calculates dependencies and optimizes the selection of file includes.

3.0.0next

- yuitest renamed to test

3.0.0pr2

- get requires yui-base

- loader requires get

- combo url build process defends against undefined modules

- Added combo handler support for CSS

- Filters are correctly applied to combo and fullpath urls

- Added compat, profiler, yuitest, widget, stylesheet, classnamemanager,

overlay, plugin, slider, console

- Added io submodules

- queue requires event

- Added submodule metadata logic

- Added plugin metadata logic

- Added skin metadata logic

3.0.0pr1

Initial Release