Adds a helloworld sample in ruby.
diff --git a/ruby/lib/helloworld.rb b/ruby/lib/helloworld.rb
new file mode 100644
index 0000000..82bdd78
--- /dev/null
+++ b/ruby/lib/helloworld.rb
@@ -0,0 +1,18 @@
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: helloworld.proto
+
+require 'google/protobuf'
+
+Google::Protobuf::DescriptorPool.generated_pool.build do
+  add_message "helloworld.HelloRequest" do
+    optional :name, :string, 1
+  end
+  add_message "helloworld.HelloReply" do
+    optional :message, :string, 1
+  end
+end
+
+module Helloworld
+  HelloRequest = Google::Protobuf::DescriptorPool.generated_pool.lookup("helloworld.HelloRequest").msgclass
+  HelloReply = Google::Protobuf::DescriptorPool.generated_pool.lookup("helloworld.HelloReply").msgclass
+end