Improve Journal logging framework:
* Allow partition log levels to be adjusted
* Cleanups
SHAMap refactoring:
* Rename SHAMapNode to SHAMapNodeID.
* Cleanups
Ledger loading cleanups:
* Fix close time settings for ledger load
* More info in ledger_request and inbound ledger JSON replies
Merge branch 'develop' of https://github.com/ripple/rippled into develop