Initial support for generating client and server stubs for Dart.

test/protos/service.proto

Index: test/protos/service.proto
diff --git a/test/protos/service.proto b/test/protos/service.proto
new file mode 100644
index 0000000000000000000000000000000000000000..56165523562585dad53802acb4c8c97a3cf486e2
--- /dev/null
+++ b/test/protos/service.proto
@@ -0,0 +1,13 @@
+syntax = "proto2";
+
+message SearchRequest {
+  optional string query = 1;
+}
+
+message SearchResponse {
+  repeated string result = 1;
+}
+
+service SearchService {
+	rpc Search (SearchRequest) returns (SearchResponse);
+}