Previously, the already-transformed paths were used, which meant that
--debug-transforms was cumbersome to use (as you had to remove all transforms
and crawl once before getting useful results).
Previously, the path prefix was only set if "windows_paths" was true, regardless
of OS. Now the path prefix is always set on windows and never set on other OSes.
"Crawled" and "Downloaded" are now printed less bright than "Crawling" and
"Downloading" as they're not as important. Explain topics are printed in yellow
to stand out a bit more from the cyan action messages.
