v0.1.0.2: create fn __dacti_main
v0.1.0.3: rename into __dacti_set_args
v0.1.0.4: update comments in __dacti_main
v0.1.0.5: put __dacti_main into function section
v0.1.0.6: revise fns __dacti_update{applications,categories,keywords}
v0.1.0.7: rename fn __dacti_comm_array into __dacti_comm
v0.1.0.8: rename fn __dacti_status_code into __dacti_set_status and fn __dacti_logger into __dacti_set_log
v0.1.0.9: update
v0.1.0.10: update
v0.1.0.11: revise __dacti_browse_categories
v0.1.0.12: update
v0.1.0.13: update __dacti_help
v0.1.1.0: update __dacti_check_status
v0.1.1.0: update README.md and doc/