3 ** enable to define folder icons in elmo.el
4 ** reconsider the structure of msgdb and make behavior faster
5 ** organize the mark for pre-fetch reservation
6 ** organize the marks for already replied (forwarded) messages
7 ** manage important marks more strictly
8 e.g. remove '$' mark in the original message after deleting message
13 ** use hash table for entries in .addresses
14 ** mitigate special treatment of NNTP around wl-folder-check-entity-async
15 ** organize variable like wl-summary-other-frame-list so as to open
16 matched summary in the new frame
17 ** organize optional setting for pipe folders to download messages at once
18 when one checks new messages
19 ** support for rfc2192, rfc2193, rfc2221 (managing imap referral)
20 ** putting codes in order