added typescript definitions to bower.json

bower.json

@@ -15,6 +15,9 @@
   "moduleType": [
     "node"
   ],
+  "typescript": {
+    "definitions": "dist/angular-grid.d.ts"
+  },
   "keywords": [
     "grid",
     "data",

src/ts/widgets/agPopupService.ts

@@ -66,7 +66,7 @@ module awk.grid {
 
             var eventFromChild: any = null;
 
-            function hidePopupOnEsc(event) {
+            function hidePopupOnEsc(event: any) {
                 var key = event.which || event.keyCode;
                 if(key === grid.Constants.KEY_ESCAPE) {
                     hidePopup(null);