Added Interactive mode, cleaned up comments.

Added Interactive mode, cleaned up comments.  Also commented out the
clipboard function, as it was unused at this time.

MD5 is spot on, but strangely SHA256 mode isn't working properly.
Stranger still it will not get the same hash for a file if using
interactive mode vs argument mode, although MD5 will(and it will be
correct.).  This will be documented as an issue until fixed.