moved IModelPathCallback to root

Author: danmarshall

src/core/maker.ts

@@ -435,6 +435,13 @@ module MakerJs {
         layer?: string;
     }
 
+    /**
+     * Callback signature for model.walkPaths().
+     */
+    export interface IModelPathCallback {
+        (modelContext: IModel, pathId: string, pathContext: IPath): void;
+    }
+
     /**
      * Test to see if an object implements the required properties of a model.
      */

src/core/model.ts

@@ -219,13 +219,6 @@ module MakerJs.model {
         return modeltoConvert;
     }
 
-    /**
-     * Callback signature for walkPaths.
-     */
-    export interface IModelPathCallback {
-        (modelContext: IModel, pathId: string, pathContext: IPath): void;
-    }
-
     /**
      * Recursively walk through all paths for a given model.
      *