use correct namespace prefix in log config
add cross-platform functions for logging exceptions
add tests to expose problem with truthy values in a app model
fix broken ClojureScript test
report errors which occur while processing a message
report add/remove when a key is added or removed
improve reporting of items removed from the data model
delete whitespace
use ::nokey instead of ::null to represent missing keys
Merge pull request #78 from pedestal/change-reporting

correctly report change when nodes have nil or false values