uniform handling of fixes: read/cert_vars, add_fixes(_i), body flag; mixfix: added Structure; renamed type exporter to export; removed obsolete sign_of; tuned signature; tuned;
uniform handling of fixes: read/cert_vars, add_fixes(_i), body flag;
mixfix: added Structure;
renamed type exporter to export;
removed obsolete sign_of;
tuned signature;
tuned;

MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle