Add email attachments to package

Use `paperclip` to save all attachment types to database

Good question, this sent me on a introspective path of self-searching and I found that I do want to keep it without validation. `Paperclip` requires you to pass in every accepted file type, OR go with the no validation at all option. Since I want to keep it open to all file types (.rb, .csv, .html, .whatever_extension_you_feel_like) I'm using the no validation option.

This has its drawbacks, about being vulnerable to viruses, etc. Doing some research about better ways of setting this up. Thanks for the prompt Liane.