add LICENSE and COPYING; fix workaround for plantuml

nodejs/public/javascripts/safechat.js

@@ -657,7 +657,9 @@ function sendmessage(recv, txt) {
             privkey.decrypt(password); // get own private key ready
             var message = JSON.stringify({receiver: recv, text: txt, files: filecontent});
             notice("2/3 encrypting message …");
-            openpgp.signAndEncryptMessage(key.keys.concat(publicKey().keys), privkey, message)
+            openpgp.signAndEncryptMessage(key.keys.concat(publicKey().keys),
+                                          privkey,
+                                          message)
                 .then(function(msg) { // message is encrypted
                     notice("3/3 sending message …");
                     emit("message", {user: userid(), content: msg});