maint: distribute README.md.

* Makefile.am (EXTRA_DIST): Add README.md.

Signed-off-by: Gary V. Vaughan <gary@gnu.org>
configury: remove unused auxdir macro.

* Makefile.am (auxdir): Remove.

Signed-off-by: Gary V. Vaughan <gary@gnu.org>
travis: let LuaRocks install dependencies and catch any missed.

* travis.yml.in (script): Remove inessential rock preinstallations.
Don't forget to run self-tests.
* .travis.yml: Regenerate.

Signed-off-by: Gary V. Vaughan <gary@gnu.org>