ditsing/ruaft @ 19dd0a573998b9c2ef6369034e450ae929442dc4

Jing Yang 807b8ceee7 Add an in-memory implementation of Raft storage.		%!s(int64=2) %!d(string=hai) anos
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src	807b8ceee7 Add an in-memory implementation of Raft storage.	%!s(int64=2) %!d(string=hai) anos
Cargo.toml	d173e212bb Create an RPC interceptor and a sample test.	%!s(int64=3) %!d(string=hai) anos