SMF-Karma-Description v2.8.1

Move languages to separate files.
Add Spanish_es language files.
Add Czech language files.

SMF-Karma-Description v2.8

Minor fixes.
Update database install script.
Add new indexes for karma table.
Fix columns delete when uninstall mod if needed.
Fix install script for MySQL 5.7 and newer.
Force karma enabled when mod installed.

Mod tested with SMF 2.0.15 and PHP 7.0.