Portlets are more similar to 03-liferay alloy-ui-exercises jsps

* For portlets 1-6, <aui:script> code was updated to follow the directions
  in the tutorial found in 03-liferay's README. Basically, it uses the
  "use" attribute and the variable "A" instead of "YUI.use()" and "Y"
* The header comments that are present by default were re-added
* The taglib with prefix="portlet" was re-added to all portlets