Improved page path handling in build.js script

Added support for "index-<page-name>.rhtml" and "index.rhtml"
Added check for body content
Improved documentation for the optimizer
Added build targets
Updated RaptorJS Packaging Developer Guide
Updated RaptorJS Packaging Get Started
Simplified documentation for the async module loader
Additional changes to the optimizer docs
Renamed the ui-components index page
Added style to global.css
Updated optimizer docs