Release 0.5.0

This is the first client release which supports passing a version header
(X-OpenStack-Ironic-API-Version). Clients prior to this version did not
pass any header; the server handles that case as "v1.1".

This version of the client passes a version header of 1.6, corresponding
to the Kilo release of the Ironic API service.

Additionally, this release includes the following changes:

* Adds 'inspection' support to node-set-provision-state
* Adds 'manage' support to node-set-provision-state
* Adds support for Node logical names in output, and via the "-n" / "--name"
  option when creating Nodes.
* Adds support for creating a configdrive automatically, if --config-drive
  specifies a directory path instead of a file name.