Update elmo-search

Signed-off-by: Youhei SASAKI <uwabami@gfd-dennou.org>
Drop packages-el installation

Signed-off-by: Youhei SASAKI <uwabami@gfd-dennou.org>
Update wanderlust settings

Signed-off-by: Youhei SASAKI <uwabami@gfd-dennou.org>