Allow "createroom" to be accessed without account

A new one will be generated. Issue #67.

src/components/messages/RoomAliased.vue

@@ -0,0 +1,17 @@
+<template>
+  <div class="statusEvent">
+    {{ $t('message.user_aliased_room', {user: stateEventDisplayName(event), alias: event.getContent().alias}) }}
+  </div>
+</template>
+
+<script>
+import messageMixin from "./messageMixin";
+
+export default {
+  mixins: [messageMixin],
+};
+</script>
+
+<style lang="scss">
+@import "@/assets/css/chat.scss";
+</style>