Moved pubsub demo_demo to examples directory of ruby

so that grpc does not depends on googleauth gem.

This project (pubsub demo) is introduced at [this
commit](https://github.com/grpc/grpc/commit/d5d00d5c8fac4495ea42020866feb913c854aa1e#diff-c495642bb64c09cae54f3ccff463bd51)
as demo project for grpc with ruby.
This demo is awesome. But the position of this project directory seems
to be not suitable for demo app. This project added unnecessary gem dependency about googleauth to grpc ruby gem.

5 files changed, 1 insertions, 0 deletions

diff --git a/examples/ruby/grpc-demo.gemspec b/examples/ruby/grpc-demo.gemspec
index 4423fd34d4..c77446249e 100644
--- a/examples/ruby/grpc-demo.gemspec
+++ b/examples/ruby/grpc-demo.gemspec
@@ -18,6 +18,7 @@ Gem::Specification.new do |s|
   s.platform      = Gem::Platform::RUBY
 
   s.add_dependency 'grpc', '~> 1.0'
+  s.add_dependency 'googleauth', '>= 0.5.1', '< 0.7'
 
   s.add_development_dependency 'bundler', '~> 1.7'
 end
diff --git a/src/ruby/bin/apis/google/protobuf/empty.rb b/examples/ruby/pubsub/google/protobuf/empty.rb
index 4743bded3d..4743bded3d 100644
--- a/src/ruby/bin/apis/google/protobuf/empty.rb
+++ b/examples/ruby/pubsub/google/protobuf/empty.rb
diff --git a/src/ruby/bin/apis/pubsub_demo.rb b/examples/ruby/pubsub/pubsub_demo.rb
index c565771d45..c565771d45 100755
--- a/src/ruby/bin/apis/pubsub_demo.rb
+++ b/examples/ruby/pubsub/pubsub_demo.rb
diff --git a/src/ruby/bin/apis/tech/pubsub/proto/pubsub.rb b/examples/ruby/pubsub/tech/pubsub/proto/pubsub.rb
index 73a0d5d9e4..73a0d5d9e4 100644
--- a/src/ruby/bin/apis/tech/pubsub/proto/pubsub.rb
+++ b/examples/ruby/pubsub/tech/pubsub/proto/pubsub.rb
diff --git a/src/ruby/bin/apis/tech/pubsub/proto/pubsub_services.rb b/examples/ruby/pubsub/tech/pubsub/proto/pubsub_services.rb
index b34db57b44..b34db57b44 100644
--- a/src/ruby/bin/apis/tech/pubsub/proto/pubsub_services.rb
+++ b/examples/ruby/pubsub/tech/pubsub/proto/pubsub_services.rb