Fixed e-mail reading order, compatibility to exchange 2010 and recursively add attachments

[mgabriel-silva]

Reads e-mails from the oldest to newest Using Beautifulsoap to read exchange 2010 and older e-mails (they don't have text_body attribute) Includes attachments now recursively, not only first level … Ignores if the artifact is already in the case, instead of getting an error