added typing of mozilla localForage library

localForage/localForage.d.ts

@@ -0,0 +1,26 @@
+// Type definitions for Mozilla's localForage
+// Project: https://github.com/mozilla/localforage
+// Definitions by: david pichsenmeister <https://github.com/3x14159265>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+declare module lf {
+    interface ILocalForage<T> {
+        clear(): void
+        key(index: number): T
+        length: number
+        getItem(key: string, callback: ICallback<T>)
+        getItem(key: string): IPromise<T>
+        setItem(key: string, value: T, callback: ICallback<T>)
+        setItem(key: string, value: T): IPromise<T>
+        removeItem(key: string, callback: ICallback<T>)
+        removeItem(key: string): IPromise<T>
+    }
+
+    interface ICallback<T> {
+        (data: T): void
+    }
+
+    interface IPromise<T> {
+        then(callback: ICallback<T>): void
+    }
+}