Removed attribute 'feed_type' from Feed - we can autosense what kind of feed it is and don't need to bother the user
Supports login/logout to IMAP server - RSpec requires a real IMAP server to connect to
IMAP can be accessed; folders created; messages stored in a folder
Renamed ImapSyncer to ImapFacade
Merge branch 'f_imap_support' into development
Tests green which store messages at the IMAP server