Update modules and dependencies, change to jsbi

* Drop gulp support
* Migrate long.js to JSBI library (for long math)
* Update karma targets

typings/globals/index.d.ts

@@ -0,0 +1,12 @@
+declare const GOOGLE_ANALYTICS_TAG: string | undefined;
+
+interface Window {
+    dataLayer: any[];
+}
+
+interface Performance {
+    webkitNow(): number;
+    mozNow(): number;
+    oNow(): number;
+    msNow(): number;
+}