Trace_Domain:
- Implement automatic test suite in test/src/trace_domains.coffee, with 13 tests
- Run these tests before xs_core xs_all_tests.coffee
- Stop allowing to overide previous trace attributes, ignore new values instead
- Gather attributes _level, _name, and _methods using local variable instead of _trace Object
- Add meta-data into _trace Object at the latest possible stage, i.e. when the trace is authorized
- fix automatic attribute names' trailer
- fix query_add()
- Rename Trace_Domain.any_instance into Trace_Domain.any_other_instance with value "Any Other Instance"
- Rename Trace_Domain.any_method into Trace_Domain.any_other_method with value "Any Other Method"
- add console.log() traces during debugging / initial testing
- remove embedded test code