Fix CRLF problems

It replaces a \r\n with \n now, and a \r with \n to also support
macOS line endings

templates/party.html

@@ -236,6 +236,7 @@
             let num = 0;
             reader.onload = (evt) => {
                 let result = evt.target.result;
+                result = result.replace("\r\n", "\n").replace("\r", "\n");
                 for (let line of result.split("\n")) {
                     for (let llnr of line.split(",")) {
                         if (llnr.length === 6 && !isNaN(llnr)) {