Set crawling MaxDepth

[Florent André]

Hi Droids people,

Here my first step in Droids ! 

Thanks to SimpleRuntime.java [1] this first step was easy ! :)

Here we go to my question : 
In the SimpleRuntime, there is this piece of code : 
SimpleTaskQueue<Link> simpleQueue = new SimpleTaskQueue<Link>();
   // simpleQueue.setMaxDepth(3);
   // simpleQueue.setMaxSize(-1);

But, simpleQueue.setMaxDepth(3); was not still in the api. 

How now I can define a MaxDepth to my Droids ? 

Thanks

https://svn.apache.org/repos/asf/incubator/droids/trunk/droids-core/src/test/java/org/apache/droids/examples/SimpleRuntime.java