Identity & Person classes added
Communicator abstract class added
FileCommunicator added
YAMLCommunicator added
CSVCommunicator added
SQLCommunicator added
SQLCommunicator class name fix
SQLCommunicator: create_tables added
Main & config fix
Configuration file communicators
Conf file update + Idmerger get function added + communicators modules renamed
CSVCommunicator update
YAMLCommunicator update
SQLCommunicator update
Config file update
Communicators refactoring: fetch methods add persons and identities to parameter rather than returning a new set
Mergers added
Mergers __main__ module fix
Merges update: transformed to classes
Main module update