Fix error message printed when unable to deserialize a json object, improve
logging of return values and add logging of exceptional returns from
json function calls.  Continue my endless quest to break the mac build.
update json validation and varint hashing
Merge branch 'phoenix' of https://github.com/InvictusInnovations/fc into phoenix
Merge remote-tracking branch 'upstream/phoenix' into http-server-improvements
fixed a bug in configure_logging that made adding more than one logger impossible