Load dependent share libraries directly to browser

This PR is to add the function to load dependent share libraries directly to browser, done by Ji Liang.

The implementation provides a command option (enableShareLibYUILoader), and a configuration item (config.enableShareLibYUILoader), they are false by default, means the dependent share libraries would be injected to browser directly when test on client side. If the option is set to true, it would works as origin design, that only inject a YUI global configuration, it is good in case performance is a concern.