Mark filter as stateful such that it works with Angular 1.3rc2.

https://github.com/angular/angular.js/commit/fca6be71274e537c7df86ae9e27a3bd1597e9ffa

Fixes #106.
Rebuild for #106.
Release v1.1.1
Make sure newly loaded strings are always used.
Rebuild.
Release v1.1.2
Also allow Angular 1.3.x.
Release v1.1.3