* algebra/catdef.spad.pamphlet (CommutativeOperatorCategory): New.
	(CommutativeOperation): Likewise.
	* algebra/Makefile.am (oa_algebra_layer_0): Include them.



git-svn-id: svn://svn.code.sf.net/p/open-axiom/code/trunk@3018 f499efd5-9937-0410-b36a-d3739c31ded8