Remove legacy rollup build files for app, autocomplete, highlight, history, and text.
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
Rename the unicode-* modules to text-*. API namespace also changes from Y.Unicode to Y.Text. [Fixes bz#4126432]
Promote the highlight-* modules out of the sandbox.