Update database dump

[sandio]

Update database dump with a new table 'cache' used by Core\Modules\Cache\Adapters\Database to cache key-value pairs in the database.

The dump to be updated is located here: https://github.com/WeAreAthlon/silla.io/blob/master/vendor/athlon/db/schema.sql

The dump might be appended with:

-- Table structure for table `cache`
--

CREATE TABLE IF NOT EXISTS `cache` (
  `cache_key` char(32) NOT NULL,
  `value` text,
  `expire` int(11) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

[pnikolov]

I've updated the code for the cache table to:

CREATE TABLE IF NOT EXISTS `cache` (
  `cache_key` CHAR(32) NOT NULL,
  `value` TEXT NOT NULL,
  `expire` INT(11) NOT NULL,
  PRIMARY KEY (`cache_key`))
ENGINE = MyISAM;