Visualize limits

Added argument show to count command, this allows the user to view a visualization of the limits per chunk, like illustrated in this screenshot: 
![2013-12-25_23 18 46](https://f.cloud.github.com/assets/616791/1809138/3103a854-6db3-11e3-9e99-9b430d0862ab.png)

Use commands like this: 

    /animals show

or 

    /villagers show