add jquery.base64 support

jquery.base64/jquery.base64.d.ts

@@ -0,0 +1,15 @@
+// Type definitions for jQuery Plugin - base64 codec
+// Project: https://github.com/yatt/jquery.base64/
+// Definitions by: Shinya Mochizuki <https://github.com/enrapt-mochizuki/>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+/// <reference path="../jquery/jquery.d.ts" />
+
+interface JQueryBase64Static {
+  encode(data: string, isUTF8?: boolean): string;
+  decode(data: string, isUTF8?: boolean): string;
+}
+
+interface JQueryStatic {
+  base64: JQueryBase64Static;
+}