1.) App now returns an error if no page-sequence declared within fo:root.

1.) App now returns an error if no page-sequence declared within fo:root.
2.) Standardized node names via a new static FONode.getNodeName() method
3.) Declarations object now tied to Root object, will no longer return NPE
    if empty (bug fixed).
4.) AreaTreeControl removed in favor of direct connection between Document
    and the Area Tree.

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@197708 13f79535-47bb-0310-9956-ffa450edef68