Major changes.  Please see description.

Refactored classes include: DataClient to ApigeeDataClient, MonitoringClient to ApigeeMonitoringClient, App to ApigeeApp, ApplicationConfigurationModel to ApigeeMonitoringSettings, CompositeConfigurationServiceImpl to ApigeeActiveSettings.

All requests now return an ApiResponse object whether or not the request was successful.
Added transactionResponseState and completedSuccessfully methods to the ApiResponse class.

Entity now reports the correct values for getProperties and getPropertyNames.

Added the ApigeeQuery class.

Updated the eventManager sample application.