Move all ipo-N directories to ipoN

fix one href pointer in testSet

No missing targets:
 > for f in *.testSet; do lxprintf -e instanceDocument '%s\n' '@xlink:href' $f | while read r; do if [ \! -s $r ]; then echo $f x $r; fi ; done ; done
 > for f in *.testSet; do lxprintf -e schemaDocument '%s\n' '@xlink:href' $f | while read r; do if [ \! -s $r ]; then echo $f x $r; fi ; done ; done

XSV is happy with all the tests:
 > lxviewport -q testGroup ~/work/xml/xmlschema/testing/runTest.sh BoeingXSDTestSet.testSet > /tmp/bt.xml