fixing bug which prevented vehicles from being inserted due to an exagerated safe gap

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@16884 29f149b2-0c63-11e1-8f5c-a347f6a9acd0
fixing output redirection and emission calculation in driving cycle tool

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@16885 29f149b2-0c63-11e1-8f5c-a347f6a9acd0
fixing slope calculation, adding warnings for unknown vehicle (types)

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@16886 29f149b2-0c63-11e1-8f5c-a347f6a9acd0