Move logic for processing project submissions into it own class.
Add a required grade book for noting information about the file that is downloaded.
Add a required "what to fetch" command line argument.  Also started refactoring some code to make the main() method a little shorter.
Do all exception handling inside methods, not the main() method;
Validate whatToFetch.
Extracted a superclass for processing student emails.
Created a new kind of student email processor for processing Survey submissions.
Add student surveys from email attachments to a Grade Book.