wenzelm [Fri, 17 Jun 2005 18:33:26 +0200] rev 16441
added theorem_space;
removed unused extern_thm_sg;
accomodate change of TheoryDataFun;
accomodate identification of type Sign.sg and theory;
removed theory management (cf. 'history' in context.ML);
moved add_typedecls to sign.ML;
Sign.init, Theory.init;
tuned;