Revert "Merge pull request #200 from sigp/new-structure"

This reverts commit d7a3545be1, reversing
changes made to 1da06c156c.

protos/build.rs

@@ -0,0 +1,10 @@
+extern crate protoc_grpcio;
+
+use std::path::Path;
+
+fn main() {
+    let proto_root = Path::new("src");
+    println!("cargo:rerun-if-changed={}", proto_root.display());
+    protoc_grpcio::compile_grpc_protos(&["services.proto"], &[proto_root], &proto_root)
+        .expect("Failed to compile gRPC definitions!");
+}