Handling imports in extended schemas

Extends marshmallow (#203)

* Better handling of extended models - special handling for marshmallow and ui/marshmallow to simplify the extended model

* Handling imports in extended schemas

Better handling of extended models - special handling for marshmallow

4.0.28

Better handling of extended models - special handling for marshmallow…

vars property

refactor needed to not duplicate code in requests

Removed >= operation in runtime and dev dependencies

4.0.26

Removed >= operation in runtime and dev dependencies (#200)

Marshmallow graph fix - dependency on self package

Fixing issue manifested in oarepo-model-builder-nr - dependency on self package

Various fixes

• generate=False with field set is behaving correctly
• Better error messages in model validation
• Fixing NPE for elements with read & write=False
• Allowing sample data to be an array of values in validation (was already accepted in later processing)
• When loading extended model, passing all the options from settings model section

4.0.23: Merge pull request #197 from oarepo/marshmallow_required

marshmallow required field

4.0.22: Merge pull request #196 from oarepo/edtf_import

edtf import fix

generate=False with field set is behaving correctly

4.0.21

generate=False with field set is behaving correctly (#195)

ext refactor

• one extension class with multiple resources and services is used in flask app instead of multiple extensions
• allows reusing services and resources in composing other services and resources