inputrc: add comments
emacs: add htmlize to desired packages
systemd-user: add [Install] section to everything
irssi: vim_mode: make Ctrl-c not enter normal mode
emacs: require a trailing newline always

Some modes set this, but fundamental doesn't, and I might as well always
have it one - it won't hurt anything since I don't often edit non-xxd'd
binaries in emacs.
bash: add a nme function to launch notmuch-mode
bash: remove superfluous stty settings

These were unnecessary with stty -ixoff, so I removed them to prevent confusion.