[Pak128] First commit of new station model (final intro/retire TBD)

git-svn-id: https://simutrans.svn.sourceforge.net/svnroot/simutrans/pak128@1369 e96eaf88-093e-0410-925f-862d53288611
Change plain high tile to new height standard

git-svn-id: https://simutrans.svn.sourceforge.net/svnroot/simutrans/pak128@1373 e96eaf88-093e-0410-925f-862d53288611