fix(#220): polyfill window.atob
fix(#220): polyfill window.atob

auth0/angular2-jwt,HaidarZ/ng2-auth,escardin/angular2-jwt,hoalex/angular2-jwt,HaidarZ/ng2-auth,hoalex/angular2-jwt,auth0/angular2-jwt,auth0/angular2-jwt,escardin/angular2-jwt