knife-spork-1.6.0

Features:

- Optionally print a link to a gist of change diffs on the command line in addition to in plugin notifications (https://github.com/jonlives/knife-spork/issues/183
- Display a warning when deleting a role currently in use by nodes on the Chef server (https://github.com/jonlives/knife-spork/issues/184)
- Spork bump will now bump in the current directory if no cookbook name is specified and metadata.rb is found (https://github.com/jonlives/knife-spork/issues/186)
- Spork promote now prompts for confirmation if a newer version of a cookbook exists on the server than the one being promoted (Thanks to @chazzle https://github.com/jonlives/knife-spork/pull/188)
- Significantly refactored git plugin, now supporting optional automatic commit & push (Thanks to @jeunito https://github.com/jonlives/knife-spork/pull/187)

Bugfixes:

- Correct parameter errors in Slack plugin README.md (Thanks to BarthV https://github.com/jonlives/knife-spork/pull/185)
- Spork data bag from file now shows an error if data bag name is missed off (Thanks to @kdaniels https://github.com/jonlives/knife-spork/pull/190)