Rebase3

As I was telling you, I basically overwrote the statistics-related classes.
If you notice something is missing, I'll fix it and issue a new pull request.

I changed something in the config classes to allow the enabling/disabling of my stats via xml
I changed the xsd 
I added some timers in the InboundInvocationHandler
I added some timers in the LockManagerWrapper
I changed the timers in the RpcManagerWrapper.

Every other stuff should be contained in the statistic-related classes