03/12/2011: This program has been superseded by SGL version 1.1.1.
02/19/2011: Version 1.1.3. Katz-Bonacich centrality added. Several syntax changes. Documentation and help file revised. Core routines are quite slow and at this point there does not seem to be much that can be done to significantly increase computation speed. Implementation using C++ is being contemplated. Thanks.