New Config Engine - small fixes + test to unflatten_scope
New Config Engine - unit test for errors_or_warnings_to_messages,  renamed 'context' to 'Context' in unit test so it does not conflict with latest Test::Spec now
NewConfigEngine - arrayref_or_undef test
New Config Engine - simplify alias/deprecated syntax for 'command'
New Config Engine - deprecated/alias options support, including warning issue. Minor bug fixes in tests. Small changes.
New Config Engine - 1) is_alias flag added 2) error when specifying option and alias/deprecation for same option
New Config Engine - more tests for case command/option alias/deprecation redefined
New Config Engine - we can't return command name in general case ,if there were errors