updated generic deep copy test to check for uniqueness of excluded attributes (e.g. id, slug, dates, etc.). Fixed typo in Question.deep_copy. Added calls to deep_copy test for template, phase and section

added theme unit tests and started cleanup of remaining existing tests

added suggested_answer unit tests and started on template unit tests

added new seed file that works with new schema. commented out plans and answers for now though because plan model is unfinished