updating links, refs #2

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@14488 29f149b2-0c63-11e1-8f5c-a347f6a9acd0
fixing warnings, refs #3

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@14489 29f149b2-0c63-11e1-8f5c-a347f6a9acd0
additional netconvert options also for internal, refs #21

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@14490 29f149b2-0c63-11e1-8f5c-a347f6a9acd0