Package moodle-install-tools: Information

- Update mt-install-lslangs:
  + determination of available locales on
    a %moodle_dir/lang/<lang>/langconfig.php files
  + out strings: <lang>\t<langname>
  + add option --moodledir

- Add mt-install-getactiveconfig

- Add new scripts:
  + mt-install-lsconfigs
  + mt-install-setconfig