Removed all unneeded zulip/zulip files

Moved the zulip-puppet/ to puppet/zulip/
We are now git cloning and rolling with a checkout to a version

puppet/zulip/manifests/postgres_common.pp

@@ -0,0 +1,16 @@
+class zulip::postgres_common {
+  $postgres_packages = [
+    # Python modules used in our monitoring/worker threads
+    "python-gevent",
+    "python-tz",
+    "python-dateutil",
+    # our dictionary
+    "hunspell-en-us",
+  ]
+  define safepackage ( $ensure = present ) {
+    if !defined(Package[$title]) {
+      package { $title: ensure => $ensure }
+    }
+  }
+  safepackage { $postgres_packages: ensure => "installed" }
+}