Added to the basic app, fixed config, added to core commands.

I added to the basic application ```console.php``` config to avoid unnecessary exception with ```fixtures path is not configured right``` and added db config (```db``` is needed for apply/clear actions), i also added folder ```templates``` where by default will be hosted templates for ```yii2-faker```, so user should not worry how to configure it and everything will be by default for him.
Added fixture to the core commands. Improved some messages and checks.