TODO graph Laplacian
updating top-line of test file
* graph-dot.lisp: Added :attributes keyword to to-dot, wrote docstring.
Adjacency, reachability, and distance matrices from graphs
loop keywords
moving tests into a test/ directory
consolidate all testing under test/
Begin implementing fast matrix operations
* graph-matrix.lisp: Conversion to femlisp matrix complete.
Added subgraphs to graph-dot.
indentation and whitespace
added `to-html' method to graph-json using d3
Merge branch 'master' into gh-pages
update