Sample Command line history query

[jeremy_sg]

Because numerous customers have asked for tips on querying Vault history from the command line, we provide this sample history query. This is intended to give people a good place to start.

In order to compile this, you must have the full Vault client installed, not just the Client API.

--Thanks to the Vault user Sergey, who pointed out that the example needed to be updated for Vault 3.0.