Reach

1) Implement ComputationResult response with the node data which was changed after execution of RunCancelCommand (values, geometry)
2) Add REST service to retrieve static data (for now it is the list of Node Models)
3) Update models drawing logic to avoid Dynamo crash on subsequent client updates
I think there is no need in a private variable to use only getter. What about just <code>public IEnumerable<string> ReturnKeys { get; private set; }</code>?