addition to \Tizo\Framework class  a few things:

 - \Tizo\Framework::$config entire array --> \Tizo\Framework::$config['framework']
 - remove \Tizo\Config class. Instead \Tizo\Framework::config() and \Tizo\Framework::$config['functions']['config'] callback list
 - add \Tizo\TIZO::CONFIG_SEPARATOR and \Tizo\TIZO::CONFIG_PREFIX constants
 - add \Tizo\TIZO::_config()
 - some \Tizo\TIZO::$config value moved to \Tizo\Framework::$config['framework']
 - some \Tizo\TIZO static variable moved to \Tizo\Framework class
 - modify the "test-tizo-tizo" test page