Add multi-region launcher support

Add custom launcher as well as support for both the original TW and JP
launchers.

www/erupe/css/main.css

@@ -0,0 +1,13 @@
+body {
+    background-color: #f8f9fa;
+}
+
+html,body {
+    height: 100%;
+    overflow:hidden;
+}
+
+.char-select-list {
+    height: 15em;
+    overflow-y: scroll;
+}