Add MIT headers.
Replace drand48 with random, closes #7.
Change naming policy from POSIX-reserved names.
Make visualized nodes red/black, ref #8.
Change data nodes to HTML tables.
Extend arrow down to data node.
Make red/black background colour transparent.
Turn node visualization from records to html.
Place edges at the top center of the node.
Update readme with new naming conventions.
Add in png banner to the readme.
Add _site into gitignore.