Add aRGENTeaM provider

[mmiraglia]

aRGENTeaM is a great spanish subtitle provider, especially for the latin community. Only episodes subtitles are supported in this first release of the provider.

[mmiraglia]

I fixed some errors from the previus PR. I hope this time everything is OK.

[fernandog]

@mmiraglia you missed this implementation: #778

Also Diaoul has the final word about providers. I can't do much about this

[mmiraglia]

@fernandog I relied on the develop branch ... I do not understand how I missed it :(
Anyway, can you help me to incorporate the implementation to this branch? Even with a googled link :)

[mmiraglia]

@fernandog my bad! Finally I understood your requirement. Please, check it and give me your feedback.

[fernandog]

@mmiraglia remove the commented code

[fernandog]

@mmiraglia you also missed the cassettes. When you run the test it creates a cassette. Check the test foldee

[mmiraglia]

I'm sorry @fernandog . As I mentioned earlier, I am new developing python and github.

[ratoaq2]

I squashed your commits and fixed remaining issues to have a functional provider

Fixed by 41f5c15
Thanks