adding :author information to asd files
Generate unique name for subgraphs

Removed unique-name from subgraph structure and modified introductory
comments.
Better colors for example graph

Uses the Brewer color facility of graphviz.
Simplified subgraph-print a bit

Starting to consolidate calls to (format)
attributes is an assoc list, not list of lists
Merge branch 'master' of github.com:eschulte/graph
don't test edge order in graph copy

  Suggested by Kilian.
removed test for removed adjacency-matrix function
Relational structures
Fixed tests, all pass now
Graphviz attributes can be upper or mixed case
Merge branch 'harris-equal'
Use ~s format directive for printing ranks
Export the constant, infinity
fix documentation for merge-nodes
Merge branch 'master' into gh-pages
update