Packaged as a ruby gem

Loads "chef/knife/core/object_loader" for each plugin, as this
isn't loaded automatically for gem knife plugins
Minor improvements:

* Warn when items have not changed
* role and env allow for multiple files
* Use ui.confirm, and say when an item has been saved
Merge pull request #1 from borntyping/master

Packaged as a ruby gem and made some improvements