- starting with the model and the test suite

- now types are contained inside an enum
- added the basic primitives to the test structure, including lists checks
- reworked the node to start getting the customization going (and make sense of the whole thing)

- created hierarchical container capable of tracking type inheritance
- added all geometry tests

- finished all primitive date type tests

This reverts commit 1621855.

- completed tests checking inf inheritance works on individual and on list level

- added a few additional comments
- additional test checking if inheritance stops at the desired level (ie. `Cone` does not inherit from `Curve`)

- removed the Enum, replaced directly with Type

- removed dictionary in favor of list of datatypes
- renamed methods to better suit the specificity of the node functionality they were serving

- now returns the input as an output
- not doing much with the result of the validation though, except returning to the first value of the drop-down

- added functional IsAutoMode and IsList inputs to the Model
- removed the ViewModel

- do not change dropdown if not in AutoMode
- added detailed description to IsAutoMode property

- public static method of retrieving the list of datatypes replaced by an internal static property DataNodeDynamoTypeList

- IsSupportedDataNodeDynamoType now internal
- refactor