fix parse bug with windows style newlines

lib/sse.js

@@ -152,7 +152,7 @@ var SSE = function (url, options) {
     var data = this.xhr.responseText.substring(this.progress);
 
     this.progress += data.length;
-    var parts = (this.chunk + data).split(/(\r\n|\r|\n){2}/g);
+    var parts = (this.chunk + data).split(/(\r\n\r\n|\r\r|\n\n)/g);
 
     // we assume that the last chunk can be incomplete because of buffering or other network effects
     // so we always save the last part to merge it with the next incoming packet