Warn if CookbookSource#name is different from the metadata name
Remove AmbiguousCookbookName
Replace with old error code. List me as the author on MismatchedCookbookName.
Fix location_spec test
Fix rebase conflicts

- Fixes #123
- Fixes #497
Merge pull request #502 from sethvargo/cookbook_name

Warn if CookbookSource#name is different from the metadata name