BeaconService to log a warning if it's unable to find any IP addresses which other nodes can use to address its node.
Merge pull request #310 from joshua-g/beaconservice-warning

Improve message when BeaconService can't find any local IPs
Change BeaconService to allow it to tell all other nodes that it is located at their loopback address, a directive that only makes sense if all nodes are on the same host, for the purpose of testing.
Rename ModuleServer to ModuleInformationProvider, which is more descriptive of what it does
Rename ModuleInformationProvider's methods to better describe what they do.
Remove or clarify additional uses of the phrase "write-ahead log" in c5db-olog and c5db-replicator
Rename module "c5-modules" to "c5-api" (resolves #268)
Readability improvements to C5GeneralizedReplicationServiceTest
Downgrade several logger severity levels in InRamSim to info/debug level (fixes #291)