Fixing a problem with deserialization.

The changing of the XStream version solves the problem of deserialization reported in #628.

Closes #628.
Yes, change to recursive.

Also, you could remove a lot of code if you just change the `XStreamBuilderImpl#xmlInstance`:
```java
VRaptorXStream xstream = new VRaptorXStream(...);
xstream.getVRaptorMapper().getSerializee().setRecursive(this.recursive);
return configure(xstream);
```