grpc - RPC system from Google

	Commit message (Expand)	Author	Age
*	Deprecate grpc::thread and sync in favor of std::thread,mutex,etc	Vijay Pai	2016-11-01
*	clang-format	Vijay Pai	2016-11-01
*	Use C++11 final and override	Vijay Pai	2016-11-01
*	removed codegen/log.h	David Garcia Quintas	2016-07-27
*	Deal with to_string, proper usage of nullptr, and lack of map::emplace	Vijay Pai	2016-06-15
*	Got carried away with grpc::	Vijay Pai	2016-06-15
*	Enforce gcc-4.4 compatibility on test_credentials_provider by changing	Vijay Pai	2016-06-15
*	Auto-changes	Craig Tiller	2016-03-25
*	clang-format	Craig Tiller	2016-02-29
*	Allow new credential types to be added to tests.	Dan Born	2016-02-24
*	Use standard include paths.	Dan Born	2016-02-24
*	Initialize mutex to nullptr.	Dan Born	2016-02-24
*	Injectable test credentials provider interface.	Dan Born	2016-02-24
*	move tls type name to .cc file	yang-g	2016-02-19
*	Add a helper to return all the secure types	yang-g	2016-02-19
*	Revert "make an enum"	yang-g	2016-02-19
*	make an enum	yang-g	2016-02-18
*	Refactor end2end_test. Make the credentials a separate library.	yang-g	2016-02-18