adding flowrouter and traceexporter example, refs #784

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@17313 29f149b2-0c63-11e1-8f5c-a347f6a9acd0
tweaking link colors to better distinguish stop and allway_stop from the other rules refs #36

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@17314 29f149b2-0c63-11e1-8f5c-a347f6a9acd0