make flashes dismissible.

static/main.css

@@ -224,6 +224,11 @@ footer ul li:not(:last-child)::after {
     background-color: rgba(255, 60, 30, 0.2);
 }
 
+#flashes .dismiss {
+    float: right;
+    margin: 0 0 0.5em 0.5em;
+}
+
 #character-portrait {
     position: relative;
     display: inline-block;

static/main.js

@@ -14,6 +14,17 @@ $(function() {
         return false;
     });
 
+    // Allow user to dismiss flashes:
+    $("#flashes > div").each(function() {
+        $(this).prepend($("<a>", {
+            addClass: "dismiss",
+            href: "#"
+        }).html("[&times;]").click(function() {
+            $(this).parent().remove();
+            return false;
+        }));
+    });
+
     // Toggle character options on click:
     var charopts = $("#character-options");
     charopts.hide();