Add VultModulesFree to plugin manager

manifests/Southpole.json

@@ -1,5 +1,5 @@
 {
-  "name": "Southpole Modular",
+  "name": "Southpole",
   "author": "Gerhard Brandt",
   "license": "BSD-3-Clause",
   "manualUrl": "https://github.com/gbrandt1/southpole-vcvrack/blob/master/README.md",

manifests/VultModulesFree.json

@@ -5,5 +5,6 @@
   "authorEmail": "modlfo@gmail.com",
   "authorUrl": "http://modlfo.github.io",
   "pluginUrl": "https://github.com/modlfo/VultModules/releases",
-  "latestVersion": "0.6.3"
+  "latestVersion": "0.6.4",
+  "status": "available"
 }