mapserver_address.t: handle BBBIKE_TEST_SKIP_MAPSERVER variable

Skip all tests which do the mapserver redirect if mapserver should not
be tested (e.g. if it is not configured and available at all). This
leaves only the start and multiple results pages for testing.
data update (minor)
Merge remote-tracking branch 'eserte/master' into world
travis-ci: no more CGI special handling

The latest (4.09) is fine with the latest bbbike cgi changes.
travis-ci: workaround for Tk + EUMM 7.00 problem

Use the newest Tk devel version until the next stable comes out.
Merge remote-tracking branch 'eserte/master' into world