FIX: initialize message settings for scenario messages

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6252 8aca7d54-2c30-db11-9de9-000461428c89
FIX: be more flexible with href-attribute of a-tags in flowtexts, do not crash if malformed parameter

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6253 8aca7d54-2c30-db11-9de9-000461428c89
Translate from german and add documentation to a file.

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6254 8aca7d54-2c30-db11-9de9-000461428c89
sqapi: ADD: hyperlinks to tabs and map positions are accepted in scenario window

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6255 8aca7d54-2c30-db11-9de9-000461428c89