Speed up following-sibling::node() and preceding-sibling::node(). Should be about 2x  faster now.
Speed up following-sibling::node() and preceding-sibling::node(). Should be about 2x 
faster now.

svn path=/branches/DLN/eXist-1.0/; revision=4190

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