added seriesly store
added seriesly store

> store fast/slow snapshot
> persist fast snapshot

ronniedada/litmus,couchbaselabs/litmus,mikewied/cbagent,couchbaselabs/litmus,couchbase/cbmonitor,couchbase/cbmonitor,vmx/cbagent,couchbaselabs/priority15,couchbaselabs/priority15,ronniedada/litmus,pavel-paulau/cbagent,couchbase/cbagent,couchbaselabs/litmus,couchbaselabs/priority15