CODE: remove include

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6709 8aca7d54-2c30-db11-9de9-000461428c89
ADD default theme; DELETE unused default skin

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6710 8aca7d54-2c30-db11-9de9-000461428c89
CODE: add some more besch base classes, simplifies interfaces, reduces code duplication

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6711 8aca7d54-2c30-db11-9de9-000461428c89
.. and adjust Makefile

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6712 8aca7d54-2c30-db11-9de9-000461428c89
FIX: destroy_framed_win could destroy wrong gui

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6713 8aca7d54-2c30-db11-9de9-000461428c89
spelling policy hits again

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6714 8aca7d54-2c30-db11-9de9-000461428c89
remove unused variables

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6715 8aca7d54-2c30-db11-9de9-000461428c89
FIX: do not modify const char*-s

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6716 8aca7d54-2c30-db11-9de9-000461428c89