renaming 'Nodes' to 'Junctions' in the gui settings dialog refs #36

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@15518 29f149b2-0c63-11e1-8f5c-a347f6a9acd0
extensions for netedit (bidirectional splitting) refs #457

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@15519 29f149b2-0c63-11e1-8f5c-a347f6a9acd0