Updated the the test results for the 'complex expression' tests
Updates to test results where the logical 'and' is used
Updated the expression assistant with some utility functionality
Changed logging and added a some documentation for the union type transformation
Added a few more tests to exercise generation of the and expression
Added a transformation for the 'and' expression
Refactoring of the and expression transformation
Added four tests to exercise the transformation and generation of the 'or' expression
Added transformation for the or expression