Create gRPC client and server, traceservice, that stores trace data in a BoltDB backend.

trace/service/README.md

Index: trace/service/README.md
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+To compile the proto buffers definition you need to install version 3.0 of
+protocol buffers.
+
+Check out the repository and compile it run:
+
+    $ git clone git@github.com:google/protobuf.git
+    $ ./configure --diable-shared
+    $ make
+    $ make check
+    $ sudo make install
+
+The 'disabled-shared' option is necessary if an older version of
+protoc is already installed on your system.
+
+Install the necessary go packages:
+
+    go get -a github.com/golang/protobuf/protoc-gen-go
+    go get -u google.golang.org/grpc
+
+To generate code run in this directory:
+
+    go generate ./...
+
+Or use protoc directly:
+
+    protoc --go_out=plugins=grpc:. traceservice.proto