Added watchdog service.
tagged riak_ensemble.
Added consensus to the default.
Fixed hypervisor lookup.
Watchdog should not start ensamble.
Fixed clearning and raising.
Adding ticks to watchog.
Added get alerst.
Fixed bug that alerts never cleared.
Fixed bug in getting riak_core alerts
Added check for reloading hypervisors.
Fixed watchdog to send correct errors.
merge.