Imports of go command

PathSynopsis
github.com/golang/protobuf/protoPackage proto provides functionality for handling protocol buffer messages.
github.com/golang/protobuf/ptypesPackage ptypes provides functionality for interacting with well-known types.
github.com/lyft/protoc-gen-validate/tests/harness
github.com/lyft/protoc-gen-validate/tests/harness/cases/go
io/ioutilPackage ioutil implements some I/O utility functions.
logPackage log implements a simple logging package.
osPackage os provides a platform-independent interface to operating system functionality.