sort_routes now supports persons and copies additional elements

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@17438 29f149b2-0c63-11e1-8f5c-a347f6a9acd0
added test for pedestrian interaction on a large walkingarea

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@17439 29f149b2-0c63-11e1-8f5c-a347f6a9acd0
fixing multiple pedestrians entering the same spot and improved between different paths on the same walkingarea refs #1506

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@17440 29f149b2-0c63-11e1-8f5c-a347f6a9acd0