Added Go client section, small improvements to rest of doc

Update README.md

Fix broken link

make the format correct.

More README.md improvements.

Update to match standard Go style.

Suggest the standard `go get` for downloading the demo.
Remove instruction to set GOPATH during install flow,
since the prerequisites section already does that.

Remove completely unused dial options, and
reorder a bit of code to match what real code would look like.

Created helloworld tutorial outline

Tidy up README.md.

Simply Go version requirement.
Use `go get` instead of `go install`.
Don't mention $GOBIN, which is irrelevant for most people.
Fix a couple of typos.

New top level README and cpp/README to set up navigation structure.

Simple streaming example for overview

Grpc samples golang add helloworld

Improving user experience.

change proto README cpp node ruby

Some more tidying up, simplified example text further

Fixes the gem name.

Add helloworld example in c++