Merge pull request #114 from verkholantsev/functions_as_defaults

Get default value for field as function execution result
Merge pull request #113 from verkholantsev/is_changed_for_models_and_models-list

implement isChanged method for field type model and models-list
Flag `ignoreIfChanged` implemented

Conflicts:
	common.blocks/i-model/__field/i-model__field.test.js
Merge branch 'ignore_if_changed_flag' into fork