I added the model facade class / ut: new_model method is implemented.
I added the update and find_by_pk methods into model facade.
I added the update and find_by_pk methods into model facade.
I added the unit tests for find_by_pk method.
I added delete operation into model facade.
I added rollback conclusive unit tests for model facade.
I added ModelFilter class as well as unit tests. I updated doc for model facade.
I updated mvc documentation so that it documents filters as well.
I added like / in comparisons into model filter.
I added and compound filter.
I added a common class for implementing compound filters.
I renamed the test suite for ModelFilterAnd.
I added unit tests for ModelFilterOr. I updated documentation for mvc.
I added an abstract base class for describing mvc filters.
I updated model filters documentation as well as exceptions hierarchy.
I added model sort filter. I updated documentation.
I removed complaint about super keyword in classes.
I corrected the pylint warning about old style clases.
I added support for get records paged success scenario.
I added support for get_records_paged without optional parameters.