Refactored the Image module. Added image.fromUrl method. Added image-tests.

image/image_impl.d.ts

@@ -0,0 +1,8 @@
+/**
+* This module is used as a native implementation for each of the underlying platforms.
+* Users will not typically require it as it supports the module infrastructure.
+*/
+export declare function fromResource(name: string): any;
+export declare function fromFile(path: string): any;
+export declare function fromData(data: any): any;
+export declare function saveToFile(instance: any, path: string, format: number, quality?: number): boolean;