Tiny modification for vimrc and Xmodmap

Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
config: copy fontconfig to the right place

Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
muttrc: Make `git am` easy and possible via mutt

add two variables:
*pipe_split* will control the pipe behavior of mutt,
and *auto_tag* will control function behavior when
there are tagged mails.

Signed-off-by: Boqun Feng <boqun.feng@gmail.com>