Switch to new release of go protocol buffers and proto and rpc service compiler

[baryluk]

Background

https://groups.google.com/forum/#!topic/golang-nuts/F5xFHTfwRnY

Already released.

golang/protobuf#591
https://github.com/golang/protobuf/releases/tag/v1.1.0

It is faster, and has a better forward compatibility, by forcing people to use named literals, and do not assume order of fields in the message. Plus some other nice tweaks. I do not know what is the impact on memory usage (asked on golang-nuts mailing list, maybe they know). Binary size should increase slightly, but maybe just few KB from what I can see in generated code.

Found this out when I "accidentally" regenerated LND RPC protos with newer compiler and Go plugin.

protoc-gen-grpc-gateway protoc-gen-swagger also do generated slightly different code. Only minor differences, some just cosmetic.

There is probably no need to change any of lnd code itself.

./docs/go-fuzz/wirefuzz.go might require a change from reflect.DeepEqual to proto.Equal.

egrep -A 1 -r '&?\blnrpc\.[a-zA-Z_0-9]+{([^}]+| *$)' . show that all protobuf messages are used as literals with named fields.

I did not try compiling with new version, as I encountered other issues.