Start project to publish pb2 generated modules for services we depend on.

[dhermes]

See #1317 for context

It's also possible that the owners of googleapis-common-protobufs will publish this

/cc @tbetbetbe

[tbetbetbe]

We're going to start doing this from next week. The capability is already there now, but there are breaking changes in the gRPC client surface in v0.12, so we'll start next week once gRPC 0.12 packages are published

[dhermes]

We'd like to rely on them with gRPC as an optional dependency, e.g. for datastore.

Is this a possibility or at least putting the proto message definitions in separate modules than the gRPC service definitions?

[dhermes]

Also is there some public code or issue tracker or repo we can follow along with?

[dhermes]

@tbetbetbe Any updates here?

[tbetbetbe]

FYI: @nathanielmanistaatgoogle, there is a grpc issue tracking part of this grpc/grpc#3866, will you open another to track the actual split ?

[dhermes]

Thanks for the update!