Moved application configuration to JSON format. 
Moved HyperBird database specific configurations from source code to
application configuration file with naming hb.db.xxx .
Added class to handle global settings for the application providing some
hooks. Currently only logs application start/stop.
Added new DbConfig class to provide access to configured HyperBird exist
database configurations.
Refactored data access layer to allow for easier switching from exist
REST API to XQS/XQJ driver if needed. 
API URL changed again but this is only a new proposal to be discussed.