Add hindent-mode
Add hindent-mode

A small minor mode that adds reasonable keybindings for hindent to the
current buffer:

C-M-\ (indent-region) is rebound to hindent-reformat-region

M-q (fill-paragraph) is rebound to the new hindent-reformat-decl-or-fill
command which is like fill-paragraph if point is inside a comment, and
otherwise forwards to hindent/reformat-decl

ennocramer/floskell,cblp/hindent,sighingnow/hindent