Suggestion: Add dolar MEP and dolar CCL

[gerardog]

Great job. Fan of the website.
It would be great addition to add Dolar MEP and CCL.

Past series can be downloaded from
https://www.rava.com/perfil/DOLAR%20MEP
https://www.rava.com/perfil/DOLAR%20CCL

Finally, an option to download all data in csv would be great too.
Thanks.-