Merge pull request #3905 from cseufert/master

Intercom.JS - Added off method

intercomjs/intercom-tests.ts

@@ -17,4 +17,6 @@ function test_intercom_static() {
     console.log(onceListenerInvokedTimes === 1);
 
     instance.emit("eventWithoutAMessage");
+
+    instance.off("test", detect);
 }

intercomjs/intercom.d.ts

@@ -17,6 +17,12 @@ declare module intercom {
           * @param fn The listener method to invoke.
           */
         on(name: string, fn: Function): void;
+        /**
+         * Remove a registered event listener
+         * @param name The string event listener name.
+         * @param fn The listener method to remove.
+         */
+        off(name: string, fn: Function): void;
         /**
           * Given a unique key to represent the function, fn will be invoked in only one window. The ttl argument represents the number of seconds before the function can be called again.
           * @param key The unique function identifier key