Delete file & dependent data in database with command line argument

[guswelter]

Leaving this here as a nice-to-have for future:

1. Delete file & patterns/annotations from database
   1. Since the default behavior of deleting a file from disk is to leave patterns & annotations intact, there should be a way to delete a file from the database using a command line argument.
   2. The -df or --deletefile flag with a filename argument should delete the file and its patterns & annotations from the database.
      1. Example: auv -df somefile.h5