FIX: A number of issues with the previous commit.

git-svn-id: https://simutrans.svn.sourceforge.net/svnroot/simutrans/pak128.Britain@1176 e96eaf88-093e-0410-925f-862d53288611
CHANGE: Rescaled images for channel ferries

git-svn-id: https://simutrans.svn.sourceforge.net/svnroot/simutrans/pak128.Britain@1177 e96eaf88-093e-0410-925f-862d53288611