Imap error

Hi

two small commits: cleaning up some pyc files from git status and I think the port argument was missing from IMAPAuthenticationerror. At least I got the following error:

  File "/usr/lib/python3.3/site-packages/rss2email/email.py", line 341, in send
    imap_send(message=message, config=config, section=section)
  File "/usr/lib/python3.3/site-packages/rss2email/email.py", line 193, in imap_send
    server=server, username=username)
 TypeError: __init__() missing 1 required positional argument: 'port'

Hope this fixes it.