Initial working version. Follows relative urls, meta refreshes, prints summaries, etc.
Many small efficiencies.
- Handle https.
- Use urljoin to simplify following relative urls (no regex).
- More liberal parsing of meta refresh tags, using no regex.
  - Just finds the first occurrence of 'url=' and takes the rest of the string.
Oops, it was still reading the HTML body on every step, not just status 200's.
Added actual option parser, and option for changing user agent away from browser-mimic one.
Tweak to better detect debug option.
Merge from github to upload this repo