Minor changes to Makefile.
Focus shifts down after 'D' is pressed to flag email for deletion.
Flags are shown by default whenever ALL emails are being displayed.
Modified configuration and specification file to add account level options for specifying Trash Folder and whether to explicitly delete emails or not.
Added copy() method of imapServer to allow emails specified by list of UIDs to be copied to specified folder.
Modified quit() method of urwidDisplay so that it reads configuration settings and first copies delete-flagged emails to Trash and then possibly deletes them from the Inbox.
Fixed problem with title change on deletion to indicate deletion process.
Require forced redrawing of urwid elements by calling MainLoop() method for redrawing.