Store an email as a directory

[ruji-xie-467]

Create directories when we get the email list (instead of one file representing one email)

Each “Email’s personal directory” could have:

The email subject + unique ID will be the name of the directory

A file with the text content in html format

A file with the text content in plaintext format

Attachments are each their own file

Another file with all of the raw MIME data

Another file with all of the raw MIME data