Compiles and runs w/o error, but produces dot files that won't load,
due to parenthesized negative numbers.
I need a custom type, which encapsulates a Complex Double and
provides an alternative instance of Show.
Compiles w/ new PrettyDouble type. However, *.dot file still doesn't load.
Checking in, so I can checkout a previous working version and generate a
reference *.dot file.
treeviz-0.0.3
Graph now uses computational nodes. However, they still need typing.