This is to pick up fixes that allow rules_go to work on Windows. There
are several required steps to make this work:

1. Remove fork of go_proto_library.bzl and rework pgv_go_proto_library
to use proto rules from rules_go
2. Because of 1, bump dependencies in Gopkg.toml to match those in
rules_go
  a. github.com/golang/protobuf -> v1.1.0
  b. github.com/lyft/protoc-gen-star -> v0.3.7
  c. github.com/gogo/protobuf -> v1.0.0
3. Correct location in Makefile for generated validate.pb.go
4. Update protos in tests/kitchensink to explicitly set go_package
option. Without this option, the generated *.pb.validate.go files had
empty package names (the regular *.pb.go files were fine)
5. Rerun "gazelle fix" in the vendor directory to regenerate BUILD.bazel
files.

Signed-off-by: Sam Smith <sesmith177@gmail.com>