implemented new message notification popup window.
possible fix for gmodule link error on some environments (#74). Updated copyright year.
differentiate DNS lookup error from connection errors.
Automatically select appropriate Junk folder on filtering.
made the progress of receive dialog display only number/size in current session, not including already received ones.
block notify if a new message is read on receiving.
implemented the automatic filtering of IMAP4 INBOX folder.
impelmented POP before SMTP.
exclude messages marked as read when counting new messages.
fixed 32-bit integer overflow where the total size of POP3 messages is greater than 2GB.
Initial import of Sylpheed (GTK2 version).