Pompem V3 - review asyncio implementation

[Rafael Francischini]

Hi, I'm working on a new version for pompem, which fixes some scrapers and also the support for searching exploits from deep web sites.

I need help, to finish, it's a little short.
The branch is here https://github.com/rfunix/Pompem/tree/pompem_v3.
Any questions, I am are available.

This issue, focused in review asyncio implementation.
Asyncio is a little new to me, so it may contain minor implementation errors.