Impress.js definitions and tests added

Definitions/impress-0.5.d.ts

@@ -0,0 +1,13 @@
+// Type definitions for Impress.js 0.5
+// Project: https://github.com/bartaz/impress.js
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+interface Impress {
+    init(): void;
+    getStep(step: any): any;
+    goto(element: any, duration?: number): any;
+    prev(): any;
+    next(): any;
+}
+
+declare function impress(): Impress;