fix #8798 - patch by AlfonZ - fix extruder

git-svn-id: http://josm.openstreetmap.de/svn/trunk@6252 0c6e7542-c601-0410-84e7-c038aed88b3b
fix #5133 - add command to remove nodes from ways - patch by Giuseppe Bilotta

git-svn-id: http://josm.openstreetmap.de/svn/trunk@6253 0c6e7542-c601-0410-84e7-c038aed88b3b