Add manganelo extractor

[folliehiyuki]

Closes #676. Based on mangakakalot extractor, since they are similar.
I don't know how to get the hash of content, url, keyword,... for the test.

Help appreciated.

[mikf]

Thank you for the contribution.

Do you know what's the deal with manganelo.tv? I searched for manganelo and Google spit out manganelo.tv as the first result. It looks very much like manganelo.com, but its HTML structure is different.

I don't know how to get the hash of content, url, keyword,... for the test.

Hashes should only be used for static results, but https://manganelo.com/manga/gq921227 is still "Ongoing". It'd be better to use pattern and count like in the other test below so tests don't start failing when a new chapter gets added.

To get the hash values, I usually make sure everything works as it should, then run tests with empty url, etc and fill in the results from there: python test_results.py manganelo.

[folliehiyuki]

Do you know what's the deal with manganelo.tv?

Sadly I don't.
I think manganelo.com is the more legit one, since lots of search results from mangakakalot.com point to manganelo.com and they use the same domain to host the images.

Hashes should only be used for static results, but https://manganelo.com/manga/gq921227 is still "Ongoing"

The manga is actually finished. I could find other ones that are finished as well but still in "Ongoing" status on manganelo.com