Add Prezi to integrations page

server/pages/integrations/content.json

@@ -69,6 +69,13 @@
     "category": "Collaboration",
     "description": "Data collection tool and surveys, for professionals"
   },
+  {
+    "slug": "prezi",
+    "name": "Prezi",
+    "url": "https://prezi.com",
+    "category": "Collaboration",
+    "description": "Easy presentations for people who aren't designers"
+  },
   {
     "slug": "codepen",
     "name": "Codepen",

server/pages/integrations/prezi.md

@@ -0,0 +1,7 @@
+In an Outline document, paste a link to a shared [Prezi](https://prezi.com) presentation and it will be automatically converted into an embedded preview like the one below…
+
+[Learn more about sharing a Prezi](https://support.prezi.com/hc/en-us/articles/360003498633). 
+
+![Prezi Integration](/images/screenshots/prezi.png)
+
+> This integration works without any additional settings or authentication.