Un-remove AutoComplete's ARIA live region.

AutoComplete accessibility improvements. Made the following changes based on advice from the Y! Accessibility team: - Removed role="combobox" from the input node. It's not appropriate for all AutoComplete use cases, and is usually not necessary. - Removes the live region that announces suggestions. It's redundant in assistive tools that properly support the other ARIA functionality that AutoComplete implements.

Replace bogus node-region dependency with node-screen.

Much better scrollIntoView functionality.

Updated *.properties files to comment out the global.build.component in each *.properties file so modules are no longer built into a rollup build dir, they are expanded into a per module directory structure

Reposition the result list when the window is resized.

Switch to shim-plugin instead of widget-stack, and add a default z-index in the core autocomplete-list CSS. This fixes a shim bug in IE6 in which the shim wasn't sized correctly the first time the list was shown, and also resolves default z-index issues in all browsers that required implementers to manually set the z-index in JS in order for it to take effect.

Add selector-css3 as an autocomplete-list dependency. Fixes some broken selectors in IE.

Move code for JSONP and YQL sources into a separate autocomplete-sources module. The autocomplete-sources module is included in the autocomplete rollup, but is no longer part of autocomplete-base, which results in a smaller base module when the extra sources aren't needed.

Internationalize autocomplete-list strings. Only an English version at the moment. Please translate and send pull requests!

Add keyboard and mouse item selection and focus management.

Move autocomplete-list back under the autocomplete module. Make Y.AutoComplete an alias for Y.AutoCompleteList.

Split autocomplete-list into its own src dir and give it a simple skin.

More work in progress on autocomplete-list.