Rebased: 12_sending_email

Changed README file

 #12: Add email ticket notifications

 #12: Send HTML ticket notification emails

 #12: Add button so users can toggle

 #12: Set up application to connect to Gmail to send emails

Add Receiver class to receive emails

 #12: Fixed probleems with comment
Merge pull request #2 from MavkaPoltavka/12_sending_email

Rebased: 12_sending_email