Switch to github.com/golang/dep for vendoring

Signed-off-by: Mrunal Patel <mrunalp@gmail.com>

vendor/google.golang.org/grpc/examples/route_guide/README.md

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+# Description
+The route guide server and client demonstrate how to use grpc go libraries to
+perform unary, client streaming, server streaming and full duplex RPCs.
+
+Please refer to [gRPC Basics: Go] (http://www.grpc.io/docs/tutorials/basic/go.html) for more information.
+
+See the definition of the route guide service in proto/route_guide.proto.
+
+# Run the sample code
+To compile and run the server, assuming you are in the root of the route_guide
+folder, i.e., .../examples/route_guide/, simply:
+
+```sh
+$ go run server/server.go
+```
+
+Likewise, to run the client:
+
+```sh
+$ go run client/client.go
+```
+
+# Optional command line flags
+The server and client both take optional command line flags. For example, the
+client and server run without TLS by default. To enable TLS:
+
+```sh
+$ go run server/server.go -tls=true
+```
+
+and
+
+```sh
+$ go run client/client.go -tls=true
+```