Added the script Utils::landing() for the simplest work with a level

See discussion > http://garagegames.com/community/forums/viewthread/136121

All objects are under the terrain
![1](https://f.cloud.github.com/assets/311074/2057830/d95f381e-8b50-11e3-8e7c-3f9584ee0a6f.png)

Ran Utils::landing()
![2](https://f.cloud.github.com/assets/311074/2057831/dd520e42-8b50-11e3-8849-a50a06783960.png)