WIP implementing createNode API.

Added KRContext::m_nodeMap and initialization logic.
Added code to hello_cube smoke test to call KrCreateNode.  (Commented until test can pass)

kraken/public/kraken.h

@@ -123,6 +123,7 @@ typedef struct
 {
   KrStructureType sType;
   size_t resourceMapSize;
+  size_t nodeMapSize;
 } KrInitializeInfo;
 
 typedef struct