BZ1043858 - Added extra API points for the Compose Page API feature.
Minor changes on Attributes

* Performance improved through caching reflect.Methods of most
common classes.
* containsKey() fixed to properly support Attributes.Key
* Make Attributes.put(key, null) equivalent to Attributes.remove() so
that it is consistent with containsKey()
* Added tests for containsKey()
* Make AttributesTest re-usable for subclasses of Attributes
Added hashCode() and equals() in security classes
GTNPORTAL-2428 Create navigation node pointing on external URI
Upgrade gatein-parent to version 1.3.0.Final
[maven-release-plugin] prepare release 1.1.0.Final
[maven-release-plugin] prepare for next development iteration