possible fix for gmodule link error on some environments (#74). Updated copyright year.
disabled 'Save all...' menu on attach view if attached files with file name do not exist.
added 'Print' menu in mime part menu. Added part widget to message/rfc822 part.
fixed a typo. code cleanup.
implemented popup menu of attachments in text view.
added the feature to reply to attached message/rfc822 messages.
implemented printing of MIME part. Code cleanups.
implemented 'Save all'.
reimplemented MimeView with GtkTreeView.
changed the implementation of switching Text/MIME view.
save selected attachments if mimeview has focus when 'File/Save as...' is selected.
improved MimeView and file selection dialog.
Initial import of Sylpheed (GTK2 version).