improving pedestrian model striping dynamics when entering a walkingarea

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@17443 29f149b2-0c63-11e1-8f5c-a347f6a9acd0
allowing smaller startup speeds in striping model

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@17444 29f149b2-0c63-11e1-8f5c-a347f6a9acd0
added test for jamming

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@17445 29f149b2-0c63-11e1-8f5c-a347f6a9acd0
now avoiding permanent pedestrian jams in striping model

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@17446 29f149b2-0c63-11e1-8f5c-a347f6a9acd0