A first cut at a function for edge length.  (Should be replaced by
a generic edge property visitor.)
changed name of object geting edge properties to EdgePropertyInspector as opposed to the always wrong and often misleading EdgeLengthVisitor.
interim checkin -- changed name of edge_length to edge_property and added
AttributeEdgePropertyInspector
fix extra complementation bug where additional cliques were reported (theoretically some could be missed as well).
Add types to the sets, this speeds things by more than a factor of two
Documentation and testing changes for edge property inspectors. (and some changes to the code so it matches the doco.
fixed typo in test
correctly count the number of graph types
Merge pull request #97 from deinst/fix_shortcut

Fix shortcut
Merge pull request #98 from deinst/spanish_inquisition

correctly count the number of graph types
Merge pull request #99 from deinst/functional_edge_computation

Functional edge computation
Fix grammar nit in docs.
Merge pull request #101 from pozorvlak/grammar_nit

Fix grammar nit in docs.
Bellman Ford initial implementation along with documentation and testing.
Changed Dijkstra to Bellman-Ford where necessary and fixed typo.
Added Bellman Ford example from CLR
Merge pull request #102 from deinst/bellman_ford

Bellman Ford initial implementation along with documentation and testing...