fixing warnings, removing unused code, refs #3, #12

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@17137 29f149b2-0c63-11e1-8f5c-a347f6a9acd0
adding devices to gui vehicle parameter list, refs #36

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@17138 29f149b2-0c63-11e1-8f5c-a347f6a9acd0
fixing repeated bt init for guisim

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@17139 29f149b2-0c63-11e1-8f5c-a347f6a9acd0