Allow for "bump" to be performed when first start hacking

[patcon]

As per this workflow:
http://www.opscode.com/blog/2011/04/21/chef-0-10-preview-environments/

1. bump version in metadata
2. hack (commiting as needed -- which some might even push to show in-dev progress)
3. tag with actual version

The explanation of the --tag argument sounded like it might only be available when bumping versions, so I just wanted to suggest that it could be performed in a standalone fashion.

Does this fit with how you imagined you'd take it?