* tuareg.el: Add support for prettify-symbols-mode.
(tuareg--common-mode-setup): Setup prettify-symbols-alist.
(tuareg-font-lock-symbols): Mark obsolete.
(tuareg-ppss-fontify): Mark unused args.
(tuareg-smie--with-module-fields-rule): Remove unused var `parent-data'.
(tuareg-smie--monadic-rule): Remove unused var `pos'.
(tuareg-mode): Adjust test to silence warning.
(tuareg-compute-arrow-indent): Remove unused arg `start-pos'.
(tuareg-compute-normal-indent): Adjust caller.
(tuareg-interactive-filter): Mark unused arg `text'.
* ocamldebug.el (ocamldebug-call-1): Remove unused var `pt'.
* .gitignore: Add *~.