switch to xerces 2.8.1 and fix spelling
switch to xerces 2.8.1 and fix spelling

tobster/openengsb,openengsb/openengsb,openengsb/openengsb,openengsb/openengsb,openengsb/openengsb,tobster/openengsb,openengsb/openengsb,tobster/openengsb,openengsb/openengsb,tobster/openengsb