move newrelic + deploytags gem to production env, rename cap tasks to .rake

lib/capistrano/tasks/nginx.rake

@@ -0,0 +1,28 @@
+namespace :nginx do
+  desc "Shut down Nginx"
+  task :stop do
+    on roles(:web) do
+      as :user => "root" do
+        execute "/etc/init.d/nginx", "stop"
+      end
+    end
+  end
+
+  desc "Start Nginx"
+  task :start do
+    on roles(:web) do
+      as :user => "root" do
+        execute "/etc/init.d/nginx", "start"
+      end
+    end
+  end
+
+  desc "Reload Nginx"
+  task :reload do
+    on roles(:web) do
+      as :user => "root" do
+        execute "/etc/init.d/nginx", "reload"
+      end
+    end
+  end
+end