wrong branch, big sorry

This reverts commit e77d08a6.

symbols durint link stage

changed cmake scripts to allow building as subproject / moved common configuration from startup scripts to separate script

Exception where the declaration and definition is
available in the header file need to be exported
with __attribute__(visibility("default")) all the
time.

git-svn-id: https://dng.biozentrum.unibas.ch/svn/openstructure/trunk@1874 5a81b35b-ba03-0410-adc8-b2c5c5119f08

git-svn-id: https://dng.biozentrum.unibas.ch/svn/openstructure/trunk@1742 5a81b35b-ba03-0410-adc8-b2c5c5119f08