Handle redirects to `manganato.to`

[krj9cr]

When using the Searcher's PickManga function, I ran into issues where apparently sometimes manganato.com and chapmanaganato.com would redirect to .to instead of .com.

I cloned this repo locally and was able to fix it by adding URLs (manganato.to, chapmanganato.to) to the urls.go file and to the colly.AllowedDomains. Happy to try to put up a PR if that's desirable, but just wanted to make the author aware of the issue, too.