added edge scaling for mesosim. fix #1413

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@16949 29f149b2-0c63-11e1-8f5c-a347f6a9acd0
made coloring by veh/type/route color in meso work the same way as in micro refs #36

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@16950 29f149b2-0c63-11e1-8f5c-a347f6a9acd0