added the possibility to pass on_complete and on_error callbacks  when caling the update, update_multiple and query methods from client_api
added the possibility to pass on_complete and on_error callbacks  when caling the update, update_multiple and query methods from client_api

Southpaw-TACTIC/TACTIC,diegocortassa/TACTIC,diegocortassa/TACTIC,Southpaw-TACTIC/TACTIC,diegocortassa/TACTIC,Southpaw-TACTIC/TACTIC,diegocortassa/TACTIC,Southpaw-TACTIC/TACTIC,Southpaw-TACTIC/TACTIC,diegocortassa/TACTIC,diegocortassa/TACTIC,Southpaw-TACTIC/TACTIC