Added support short argument syntax for CLI
Removed flag `--log` (unused)
Merge pull request #249 from l2avenholm/master

Fixed length validator's error message
Merge pull request #250 from AntonShevchuk/master

Added support short argument syntax for CLI
Fixed #252
Updated method `Options::getOption()` - added `$subKey = null` property
Added trait `Container`
Migrate `Db\Row` to trait `Container`
Small fix of Exception description
Small refactoring properties of files:
 - renamed `Db::$dbh` to `$handler`
 - renamed `Cache\Cache::$cacheAdapter` to `$adapter`
 - renamed `Cache\Adapter\Redis::$redis` to `$handler`
 - renamed `Cache\Adapter\Memcached::$memcached` to `$handler`
Updated `getOption` usage
Updated `getConfigData` usage
Updated `_loader.php`
Fixed #251 - Session refactoring
- Added methods for setup custom save handler
Fixed #181 - Added Redis save handler
Fixed #253 - changed configuration structure
Added support module configuration
Added Cache save handler for Session package
Fixed access for two methods
Fixed codestyle and configuration for testing
Fixed ConfigTest
Fixed configuration for tests
Added rule for check Cache Adapter for Session package
Added Predis cache adapter