Add sprintf.js v1.0.2.

This script provides sprintf() for JavaScript. It can be used for
example for translating strings used in JavaScript with variables.

It is licensed under BSD-3-Clause and can be found on GitHub:
https://github.com/alexei/sprintf.js

library/sprintf.js/dist/angular-sprintf.min.js

@@ -0,0 +1,4 @@
+/*! sprintf-js | Alexandru Marasteanu <hello@alexei.ro> (http://alexei.ro/) | BSD-3-Clause */
+
+angular.module("sprintf",[]).filter("sprintf",function(){return function(){return sprintf.apply(null,arguments)}}).filter("fmt",["$filter",function(a){return a("sprintf")}]).filter("vsprintf",function(){return function(a,b){return vsprintf(a,b)}}).filter("vfmt",["$filter",function(a){return a("vsprintf")}]);
+//# sourceMappingURL=angular-sprintf.min.map