Fixed badness of op_closure_t in reactor_driver.tcc.
Made the op_closure_t in network_logger.cc be saner.
Some op_closure_t mongering in read_manager.tcc.
Fixed further use of op_closure_t in read_manager.tcc to use static function.
Cleaned op_closure_t usage in reactor_driver.tcc on_change_reactor_directory.
Fixed op_closure-t usage in initialize_reactor.