Exit with the proper status (0 for success, 1 for failure)
Inspect for something non-existent

Refs #2
Remove trailing whitespace
Add simplecov to get test coverage on Ruby > 1.9
Remove dependency on thor

It has been removed in 3d86962 when it became a knife plugin and renamed
to knife-inspect.
Merge pull request #11 from gregkare/inspect_non_existent

Inspect for something non-existent
Merge pull request #12 from gregkare/trailing_whitespace

Remove trailing whitespace
Merge pull request #13 from gregkare/coverage

Add simplecov to get test coverage on Ruby > 1.9
Merge pull request #14 from gregkare/exit_status

Exit with the proper status (0 for success, 1 for failure)
Merge pull request #15 from gregkare/remove_thor

Remove dependency on thor