Add Plus (ThinkSNS+) to users (#903)

* Add Plus(ThinkSNS+) using user link

https://github.com/slimkit/plus

* Add files via upload

* readme Plus logo filename

* Update users.js

website/data/users.js

@@ -169,6 +169,13 @@ module.exports = [
     fbOpenSource: true,
     pinned: true,
   },
+  {
+    caption: 'Plus (ThinkSNS+)',
+    image: '/img/users/plus.png',
+    infoLink: 'https://slimkit.github.io',
+    fbOpenSource: false,
+    pinned: false,
+  },
   {
     caption: 'React Native',
     image: '/img/users/react-native.svg',