Introduced PodioCollection to make it easier to work with collections. Removed field and related methods from * PodioItem and PodioApp objects. Use the new array access interface instead.
Made Podio*Itemfield objects more intuitive to work with
Unit tests added for PodioCollection (and subclasses), PodioObject and Podio*ItemField classes
Improved debugging options and added Kint for debugging
Bug fixed: Handle GET/DELETE urls with options properly.
Made __attributes and __properties private properties of PodioObject instances to underline that they shouldn’t be used