Offer room creation form

A choice of public or private is offered, which maps to matrix'
visibility parameter. A name can also be provided.

Change-Id: I34d99acbc4624a9ed54ca6f6609573d5fc1049da

src/i18n/de.js

@@ -16,6 +16,12 @@ export default {
       invalid_user_id:
         "Muss eine vollständige Matrix Benutzer-ID sein, z.B. @benutzer_id:homeserver",
     },
+    rooms: {
+      room_name: "Raumname",
+      make_public: "Öffentlicher Raum",
+      room_name_required:
+        "Muss angegeben werden",
+    }
   },
   resources: {
     users: {

src/i18n/en.js

@@ -16,6 +16,12 @@ export default {
       invalid_user_id:
         "Must be a fully qualified Matrix user-id, e.g. @user_id:homeserver",
     },
+    rooms: {
+      room_name: "Room Name",
+      make_public: "Make room public",
+      room_name_required:
+        "Must be provided",
+    }
   },
   resources: {
     users: {