Added new instance, new ignore

- Added instance to the list: blog.witch.academy
 - In gitignore: ignore Vim swap files (.swp)

.gitignore

@@ -7,5 +7,8 @@ trans/
 translate/
 .po~
 
+# Vim swap files
+*.swp
+
 # Local Netlify folder
 .netlify

source/javascripts/instances.json

@@ -70,6 +70,11 @@
       "name": "Anartist",
       "description": "Anartist es una plataforma autogestionada por y para artistas.",
       "url": "https://blog.anartist.org/"
+    },
+    {
+      "name": "Witch Academy",
+      "description": "Small personal instance for anyone wishing to write, on any topic. Originally setup for friends, opened to all.",
+      "url": "https://blog.witch.academy"
     }
   ]
 }