added support for zookeeper watchers for znodes and the events of znode and deleted. Advantage: one can remove/update registries on the fly
canceling heartbeat event when a node gets partitioned; this is later restarted when the node is updated
all of this does not prevent non-reachable nodes from crashing. This is an idea around making the node manager aware of the nodes which have crashed and eventually restarting them accordingly (supervising involved\?)
0.15 version must be using 0.15 celluloid, I'd say (and specs are using rspec 2.x syntax)
Merge pull request #71 from TiagoCardoso1983/check_on_znode_changes

Ädding support for Zookeeper watchers which might enable live update of node addresses