Adds support for manganelo

[ZakYahi]

Description

Adds support for MangaNelo Fixes #326

Type of change

• [x] Support for a new site.

Checklist:

These don't have to be all checked, but if you can it would be very helpful.

• [x] If this is supporting a new site, have you done everything mentioned in the "Supporting New Sites" wiki page?**
• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I have added tests that prove my fix is effective or that my feature works

I added the test file but could not run it on my end, travis should run them. I did run the modifications using the docker dev environment, and successfully tracked mangas from Manganelo. I pretty much copied the files used for Mangakakalot since the websites are similar.

[ZakYahi]

Sorry for the bump. Do you think this is ok?

[jackblk]

bump for nice support :). i hope this get merged soon