** enable to define folder icons in elmo.el
** reconsider the structure of msgdb and make behavior faster
-** organize the mark for pre-fetch reservation
** organize the marks for already replied (forwarded) messages
-** manage important marks more strictly
- e.g. remove '$' mark in the original message after deleting message
- in 'mark folder
* other tasks
** elmo.el \e$B$G%U%)%k%@$N%"%$%3%s$rDj5A$G$-$k$h$&$K$9$k\e(B
** msgdb \e$B$N9=B$$r8+D>$7!"9bB.2=$r$O$+$k\e(B
-** \e$B%W%j%U%'%C%AM=Ls%^!<%/$rA}$d$9\e(B
** \e$BJV;v:Q$_!"%U%)%o!<%I:Q$_%^!<%/$rA}$d$9\e(B
-** \e$B=EMW%^!<%/$N4IM}$r$^$8$a$K$d$k\e(B
- 'mark \e$B%U%)%k%@$G%a%C%;!<%8$r>C$9$H!"$b$H$N%a%C%;!<%8$N\e(B '$' \e$B%^!<%/$,\e(B
- \e$B>C$($k$J$I\e(B
* \e$B$=$NB>$N\e(B TODO