prepare for move

...harp/route_guide/RouteGuideServer/RouteGuideServer.csproj

...ommon/csharp/route_guide/RouteGuideServer/packages.config

grpc-common/go/README.md

grpc-common/go/gotutorial.md

grpc-common/go/greeter_client/main.go

grpc-common/go/greeter_server/main.go

grpc-common/go/helloworld/helloworld.pb.go

grpc-common/grpc-auth-support.md

grpc-common/java/android/.gitignore

grpc-common/java/android/README.md

grpc-common/java/android/app/.gitignore

grpc-common/java/android/app/build.gradle

grpc-common/java/android/app/proguard-rules.pro

grpc-common/java/android/app/src/main/AndroidManifest.xml

.../src/main/java/io/grpc/helloworldexample/GreeterGrpc.java

...p/src/main/java/io/grpc/helloworldexample/Helloworld.java

...in/java/io/grpc/helloworldexample/HelloworldActivity.java

...a/android/app/src/main/res/layout/activity_helloworld.xml

...java/android/app/src/main/res/mipmap-hdpi/ic_launcher.png

...java/android/app/src/main/res/mipmap-mdpi/ic_launcher.png