[Emacs] Move to clojure-mode package.

Signed-off-by: Michael Markert <markert.michael@googlemail.com>
[Emacs] Gnus: Remove C-w binding.

Signed-off-by: Michael Markert <markert.michael@googlemail.com>
[Emacs] helm: Ignore tex garbage.

Signed-off-by: Michael Markert <markert.michael@googlemail.com>
[Emacs] Save undotree history.

Signed-off-by: Michael Markert <markert.michael@googlemail.com>
Update submodules.

Signed-off-by: Michael Markert <markert.michael@googlemail.com>
[Snippets] Add elisp skeleton.

Signed-off-by: Michael Markert <markert.michael@googlemail.com>