This reverts commit 63be90dd.

When 'helm version --debug' is run, this will print the kubernetes server
version as well as the helm client and server versions.

Closes #1398

Effectively, this switches us to gRPC's internal version 4. This is
compatible with protoc 3.2 and grpc-go 1.2.1.

This works around issues where $GOPATH/bin has a different version of
the protobuf Go plugin than the one Kubernetes uses.

	1. remove preliminary hapi protocol buffer definitions
	2. modify hapi Makefile
	3. update hapi protobuf model in _proto/hapi/{chart,release,services}
	4. generate protobuf src to pkg/proto/hapi/{chart,release,services}