Workaround for Dorothy 0.0.3 compatibility and improved flexibility

Hi,

there are 3 commits in this request:

1. "Adapt version and URLs to my fork; add some ignores." - you don't want this but I don't know how to exclude it from the pull request.

2. Give width and height attribute values as strings in dorothy digraph´definition to make it work with dorothy 0.0.3. The handling of numeric attribute values has been fixed in dorothy 0.0.4, but that version hasn't been released yet.

3. Refactor private dorothy-fsm-dot into public fsm-dorothy and fsm-dot for greater flexibility. This lets you grab the dorothy or dot definition for further adjustments. If making the API dorothy/dot-aware is a problem, I'd suggest moving those functions to different namespaces.

Cheers,
Bastian