git-svn-id: http://ifcplusplus.googlecode.com/svn/trunk@32 315f8137-1bae-fbf7-f064-ab920df865c0
some changes in cmake files, regarding os x and qt5

git-svn-id: http://ifcplusplus.googlecode.com/svn/trunk@33 315f8137-1bae-fbf7-f064-ab920df865c0