The new event machine will be used for loose coupling and handle the
communications between the services:

1) Block pool finds blocks which "links" with our current canonical
chain
2) Posts the blocks on to the event machine
3) State manager receives blocks & processes them
4) Broadcasts new post block event

* When catching up check linked up the chain of hashes

* Added block pool for gathering blocks from the network (chunks)
* Re wrote syncing