Add some various harmless tags to the XSS whitelist

sub, sup: Closes #579
cite, small: Bootstrap uses these for blockquotes
template: Will allow for cleaner channel scripts. Since it's contents are inert it will also allow channel admins to have "comments" in their banner.

package.json

@@ -2,7 +2,7 @@
   "author": "Calvin Montgomery",
   "name": "CyTube",
   "description": "Online media synchronizer and chat",
-  "version": "3.17.5",
+  "version": "3.18.1",
   "repository": {
     "url": "http://github.com/calzoneman/sync"
   },

src/xss.js

@@ -5,6 +5,7 @@ var sanitizeHTML = require("sanitize-html");
 const ALLOWED_TAGS = [
     "button",
     "center",
+    "cite"
     "details",
     "font",
     "h1",
@@ -13,8 +14,12 @@ const ALLOWED_TAGS = [
     "marquee", // It pains me to do this, but a lot of people use it...
     "s",
     "section",
+    "small",
     "span",
-    "summary"
+    "sub",
+    "summary",
+    "sup",
+    "template"
 ];
 
 const ALLOWED_ATTRIBUTES = [