[CR] eat from ground

Portion of Items from smashed vending machine:

![1](https://cloud.githubusercontent.com/assets/6351438/3555098/82775fae-0913-11e4-9cc2-70753551b5a6.png)

Press `[E]`, press `Esc`:
All items from vending machine (doubles excluded):
![2](https://cloud.githubusercontent.com/assets/6351438/3555105/9f8b7288-0913-11e4-9133-eae04549e52f.png)


Also: why I think there is no need new keybindings:

* User press [E]. Why? Because player want eat.
* User can select something from inventory and eat it. 
* But...sometimes user cancelled inventory? Why?
* Because in inventory no good food.
In this situation we suggest to user eat something from ground. convenient.