Rewrite all advice functions with nadvice

[conao3]

Nowadays, advice with defadvice is not a good choice.
So we should rewrite all advice functions with nadvice.

[cireu]

IMO, they shouldn't use advice at all, advice just an adhoc solution for modify function in other packages without touch their source code. Using specific keymap would be better.

Please have a look at #150

[cireu]

Maybe we can get some inspiration from https://github.com/emacs-helm/helm/blob/master/helm-occur.el#L301

[cireu]

Close in #150

@conao3 AFIAK, you can add magick word Close #xxx in the merge commit and Github will close corresponded issue automatically.

[conao3]

I know, but there are still remained another defadvice don't you?