Wrapper for sendmail, allows for multiple attachments to be sent
sendMail(receiver, subject, body, repo, mailopts = email_options(repo),
attachments = NULL)Receiver's email ID as a string. Vector if multiple email IDs
Email subject as a string
Email message body as a string
A gRAN repo object
Email options as a list
Files with full paths as an array
None
sendmail for sending simple emails