Added more methods to determine node relationships.
Added more methods to determine node relationships.

svn path=/branches/DLN/eXist-1.0/; revision=2978

MjAbuz/exist,eXist-db/exist,ljo/exist,patczar/exist,opax/exist,jensopetersen/exist,dizzzz/exist,adamretter/exist,lcahlander/exist,joewiz/exist,olvidalo/exist,patczar/exist,kohsah/exist,wshager/exist,opax/exist,adamretter/exist,eXist-db/exist,zwobit/exist,ambs/exist,jensopetersen/exist,MjAbuz/exist,wshager/exist,wolfgangmm/exist,zwobit/exist,hungerburg/exist,olvidalo/exist,joewiz/exist,ljo/exist,jensopetersen/exist,zwobit/exist,wolfgangmm/exist,ljo/exist,RemiKoutcherawy/exist,windauer/exist,windauer/exist,ambs/exist,patczar/exist,jessealama/exist,opax/exist,MjAbuz/exist,zwobit/exist,MjAbuz/exist,lcahlander/exist,ljo/exist,lcahlander/exist,wolfgangmm/exist,patczar/exist,eXist-db/exist,adamretter/exist,RemiKoutcherawy/exist,jessealama/exist,windauer/exist,jensopetersen/exist,jessealama/exist,adamretter/exist,opax/exist,lcahlander/exist,olvidalo/exist,hungerburg/exist,shabanovd/exist,dizzzz/exist,ambs/exist,wolfgangmm/exist,jessealama/exist,dizzzz/exist,eXist-db/exist,joewiz/exist,shabanovd/exist,jessealama/exist,kohsah/exist,shabanovd/exist,ambs/exist,patczar/exist,olvidalo/exist,RemiKoutcherawy/exist,RemiKoutcherawy/exist,kohsah/exist,jensopetersen/exist,kohsah/exist,MjAbuz/exist,ambs/exist,opax/exist,adamretter/exist,lcahlander/exist,windauer/exist,joewiz/exist,wshager/exist,jessealama/exist,shabanovd/exist,MjAbuz/exist,RemiKoutcherawy/exist,dizzzz/exist,dizzzz/exist,ljo/exist,shabanovd/exist,dizzzz/exist,ambs/exist,eXist-db/exist,hungerburg/exist,wshager/exist,ljo/exist,wshager/exist,joewiz/exist,hungerburg/exist,zwobit/exist,lcahlander/exist,patczar/exist,wolfgangmm/exist,wshager/exist,jensopetersen/exist,eXist-db/exist,windauer/exist,hungerburg/exist,kohsah/exist,wolfgangmm/exist,joewiz/exist,zwobit/exist,adamretter/exist,olvidalo/exist,RemiKoutcherawy/exist,kohsah/exist,shabanovd/exist,windauer/exist