added TubularMesh class to embbed pre-allocated tube dedicated objects

Babylon/Mesh/babylon.tubularMesh.ts

@@ -0,0 +1,35 @@
+module BABYLON {
+    export class TubularMesh extends Mesh {
+        public _pathArray: Vector3[][];
+        public _path3D: Path3D;
+        public _tessellation: number;
+
+        constructor(name: string, scene: Scene) {
+            super(name, scene);
+        }
+
+        public get pathArray(): Vector3[][] {
+            return this._pathArray;
+        }
+
+        public get path3D(): Path3D {
+            return this._path3D;
+        }
+
+        public get tessellation(): number {
+            return this._tessellation;
+        }
+
+        public set pathArray(pathArray) {
+            this._pathArray = pathArray;
+        }
+
+        public set path3D(path3D) {
+            this._path3D = path3D;
+        }
+
+        public set tessellation(tessellation) {
+            this._tessellation = tessellation;
+        }
+    }
+}