more explain

README.md

@@ -1,3 +1,24 @@
 sample client-server pair using gRPC and Qt in Go. The server simply stores an
 integer. The client, when started, automatically connects to the server and,
-once a second, requests the next value in an incrementing counter.
+once a second, requests the next value in an incrementing counter. I made this
+for testing the install environment when working with gRPC and Qt together in
+Go, since both have a non-trivial install process.
+
+see here to install gRPC: http://www.grpc.io/docs/quickstart/go.html
+and here to install Qt: https://github.com/therecipe/qt
+
+### Files:
+
+lib - contains the gRPC protobuf definition of our service. Our service
+defines one unary endpoint with an input message type and an output message
+type.
+lib/count.proto - the gRPC definitions, written by a human
+lib/count - the Go package containing our gRPC client and server definitions
+lib/count/count.pb.go - generated from lib/count.proto using the following protoc invokation:
+`protoc -I count count.proto --go_out=plugins=grpc:count`
+
+cmd - contains our executable programs
+cmd/count-client - a gRPC client with a Qt ui
+cmd/count-server - a gRPC server, no graphical ui
+
+