* Use nullptr (C++11) instead of NULL.
* Put each file into its own namespace declaration.
* Remove "using namespace" directives and add scope qualifiers.
* Control when beast's implementation of std::equal (C++14) is used.
* Tidy up some const declarations.
Conflicts:
src/ripple_app/shamap/SHAMapSync.cpp
src/ripple_app/tx/TransactionEngine.cpp
* Fix local advertisement (was missing)
* Fix Livecache histogram display
* If no [ips] are specified, use r.ripple.com
* Use different backing stores for PeerFinder and Validator databases
* Determine location of database files in Config
* Inject database directory or file path in PeerFinder and Validators
* PeerFinder and Validators will share the same sqlite file
* Add Livecache property stream support
* Tidy up log output
* Move peer code to ripple_overlay module
* Remove or hide some Peer interfaces
* Fix asserts by removing isConnected which was not thread safe