new config engine draft
New Config Engine - store %results in $self->{options} hash, set source to 'option' for command line options
New Config Engine - implement scopes
New Config Engine - implement validatons, minor improvement to internal assertations
New Config Engine - 'set' renamed to 'custom'
New Config Engine - unit tests for validations
New Config Engine  - actually this is integration test, not unit test
New Config Engine - option split to two functions - option and options
New Config Engine - unit tests for option and options
New Config Engine - 'mandatory' integration test and test error assertation rework
New Config Engine - unit tests for 'mandatory'
New Config Engine - more tests for 'mandatory'
New Config Engine - test for 'assert_option'
New Config Engine - unit test for 'optional'
New Config Engine - cosmetic changes
New Config Engine - integration test for optional
New Config Engine - unit test for 'validation' + a fix
New Config Engine - unit test for 'validate'
New Config Engine - scope unit tests added + minor changes
New Config Engine - additional assertions - $_ should be always localized