Added basic yii support for codeception

This PR provides basic yii and codeception integration. In Codeception\Module\Yii1 there are docs about how to use it and how to patch CHttpRequest. I did tests on basic yii application that was created by ```yiic webapp``` and they passed. Scenario that i use is in the Yii1 module docs. So i will later do a gist with those docs and will add link on it in the module description, and i think will provide some debug info for this module like in the codeception docs are written (http://codeception.com/docs/05-FunctionalTests)
>It's preferred that it be able to print additional debug information.

But i think this one can be merged so other developers will already have working integration and they can modify it or add something new. What do u think @DavertMik ?