3.0 2006-10-07
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* Refactored the library into SetObject, RelationSetObject, ElementObject
and RelationObject classes. 
* Added methods for union, intersect, complement, and xor
* Added powerset and subset methods
* Generalized static creation of element and relation with 
the ElementObject using the "+" plusproperty notation.

2.1 2006-09-05
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broke out relation.t into separate modules based on classes.
renamed "result" and "results" to "matrix" in the library code.
Added the methods to RelationSet:
	* isIdentical(otherSet) returns true if this relation set 
	is to be considered identical to otherSet; otherwise
	returns nil. 
	* equals(otherSet) returns true if this relation set
	is to be considered equal to the otherSet; otherwise
	returns nil.
	* isSubsetOf(otherSet) returns true if this relation set
	is a subset of the otherSet; otherwise returns nil.
	* isSupersetOf(otherSet) returns true if this relaiton set
	is a superset of the otherSet; otherwise returns nil.
	* hasMember([parms]) returns true if the relation is a member
	of this relation set; otherwise returns nil.
Added the following methods to RelationObject:
	* isIdentical(otherRelation) returns true if this relation 
	is to be considered identical to otherRelation; otherwise 
	returns nil.
	* equals(otherRelation) returns true if this relation set
	is to be considered equal to the otherRelation; otherwise
	returns nil.
	* isMemberOf(parms, relationSet) returns true if this relation
	is a member of relationSet; otherwise returns nil.
	* getMembershipList([parms]) returns a list of all relation sets
	for which the parameter list forms a relation.


2.0 2006-08-26
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Renamed macros:
	* DefRelation is now RelSet
	* Relate is now Relation
	
Added macros:
	* MakeRelSet used for creating dynamic relation sets
	* Relate used for creating dynamic relations
	* Remove used for removing relations

Renamed objects:
	* Relation is now RelationObject

New Objects:
	* RelationObject has been refactored into two objects:
	RelationSet and RelationObject. 
	* null is now used as a placeholder in the matrix
	* all is used for subset searches

New Methods:
	* remove(mask, [flg]) has been added to the RelationSet. 
	This method takes two parameters and is used to remove 
	relations from their respective relation sets.
	* toMatrix() returns a n x m matrix of relations where 
	n is the size of the relation set and m is the maximum
	arity of the relation set. The null object pads any 
	relation parm positions that have no values.
	* toList() returns a list of relation parms for the
	relation set
	*Not(notSet, [univSet]) returns the complement of the 
	notSet as constrained by the univSet.