* Add more cli subcommands
* Add metadata commands
* Add more subcommands
* Update cli
* Move archive commands to delete
* Add helpers for making http calls to the kv backend
* rename cli header
* Format the various maps from kv
* Add list command
* Update help text
* Add a command to enable versioning on a backend
* Rename enable-versions command
* Some review feedback
* Fix listing of top level keys
* Fix issue when metadata is nil
* Add test for lising top level keys
* Fix some typos
* Add a note about deleting all versions
* helper/keysutil: Add a policy encrypted path storage
* Add vendored deps
* Fix spelling and paths that start with a /
* Add a key version template to change configure the ciphertext prefix
* Use big.Int for base58 instead of external lib
* Update go requirment to 1.10
* Add a version prefix cache
* Move logic to helper function
* Cache the template parts
* Add a storage prefix to policy
* Add an error if the policy passed in is nil
* Pull in the go1.10 version of the math/big package until we can update
