tmux/zsh/bash/emacs: Use emacs daemon

Use emacsclient for all emacs access.  Ensure the emacsclient passes
and empty --alternate-editor value so that it will force a new daemon
to start if it isn't there already.

Signed-off-by: Ben Walton <bdwalton@gmail.com>
emacs: import go mode

Signed-off-by: Ben Walton <bdwalton@gmail.com>
emacs: activate go mode autoloads at startup

Signed-off-by: Ben Walton <bdwalton@gmail.com>
emacs: change the way we import the site-local library

Signed-off-by: Ben Walton <bdwalton@gmail.com>