Make vc-mode show on powermodeline when in vc-mode

Signed-off-by: Yen-Chin Lee <coldnew.tw@gmail.com>
change hex, digit regex

Signed-off-by: Yen-Chin Lee <coldnew.tw@gmail.com>
fix arrow

Signed-off-by: Yen-Chin Lee <coldnew.tw@gmail.com>
rename irc to erc-start-or-switch

Signed-off-by: Yen-Chin Lee <coldnew.tw@gmail.com>