Removed nested BudgetItemLinked as items property of BudgetLInked
Merge branch 'develop' of https://github.com/prjts/open-budget into develop
Cleanup indentation;
Some refactoring of ParentScopeError throwing
Another parent scope error throwing refactoring
Fixed _clean_object where attempted to clean the object while iterating on
Cleaned up and refactor stuff that become irrelevant with PathResolver;
Replaced objects cleanup with copying of objects used in _create_object and using _clean_object on the copies
Fixed name getting/generation of the container object