Reordering imports to match style guide.
Wrap added \Deleted flag in parentheses.  Fixes #23.

Apparently the IMAP specification expects that the +FLAGS argument be
surrounded by parentheses; although some e-mail backends (like Gmail)
will accept the +FLAGS argument without surrounding the \Deleted flag
in parentheses, many (reasonably) follow the specification much more
closely.  This problem was first noted in report #23.

Searching for other examples of mail deletion, I've found several
Stack Overflow articles in which people are attempting the same task,
and each either uses `imap.store` without surrounding '\Deleted' in
parentheses, or uses `imap.uid` *while* surrounding '\Deleted' in
parentheses:

* http://stackoverflow.com/questions/1777264/using-python-imaplib-to-delete-an-email-from-gmail
* http://stackoverflow.com/questions/3180891/imap-deleting-messages
Decode from ASCII with replacement if errors are encountered while gathering text.  Fixes #20.
Version 3.4.2a1