Version 0.5.0

Added trait `Container` and migrate `Db\Row` to it
Fixed #253 - changed configuration structure
- Added support module configuration

Fixed #252 - apply PHP settings from configuration file
Fixed #251 - Session refactoring
- Added methods for setup custom save handler
- Added Redis save handler - Fixed #181 
- Added Cache save handler

Updated method `Options::getOption()` - added `$subKey = null` property
Updated `getConfigData` usage
Updated `_loader.php`

Small refactoring properties of files:
 - renamed `Db::$dbh` to `$handler`
 - renamed `Cache\Cache::$cacheAdapter` to `$adapter`
 - renamed `Cache\Adapter\Redis::$redis` to `$handler`
 - renamed `Cache\Adapter\Memcached::$memcached` to `$handler`