Update Asset.php

- Added support to googleapis (probed with Google Maps).
- Add an option to indicate what to do with "unrecognized" extensions, (ex. http://ecn.dev.virtualearth.net/MapControl/mapcontrol.ashx?v=6.3c), you can: do not add the asset, add the asset to css, add the asset to less or add the asset to js.
- Add a configuration option that indicate how to generate the JQuery ready event [short hand:$( or normal $(document).ready(].
- Now if static::#domain is '/' the helper function asset is used to generate the complete URL.
testing environment for tests
updated Asset.php