grpc - RPC system from Google

	Commit message (Collapse)	Author	Age
*	delete default service account email	Chen Wang	2015-01-28
\|
*	add more tips ops	Chen Wang	2015-01-28
\|
*	Add service account credential	Chen Wang	2015-01-28
\|
*	add Compute engine credential to tips client.	Chen Wang	2015-01-27
\|
*	1) Add protection header macro	Chen Wang	2015-01-26
\| \| \| \|	2) remove some falgs with default values
*	fixed some typos	Chen Wang	2015-01-22
\|
*	TIPS client implementation.	Chen Wang	2015-01-21