Manually block up sections of output from caches into lists to avoid flo...

...oding the underlying transport

@johnynek , @jcoveney  Somewhat here as an RFC, going to do more tests with this new branch/build. 

Part of this is just a clean up of Timestamp bleeding further and into places not needed, so I could output from a final flatmap without a timestamp. We basically partition the keyspace into a set of buckets before passing off to storm.