PR #216 Breaks having multiple cookbook paths

[rabidscorpio]

#216 actually breaks having multiple paths set in cookbook_path when there's no environment_path set. It also makes the documentation obsolete: https://github.com/jonlives/knife-spork#environment-path.

What ends up happing is the cookbook paths are concatenated together before appending the name of the <environment>.json file.

[jonlives]

That's..unexpected! The only time it should look at the cookbook path is when it calls the cookbook_path method which always takes the first element of the array - are you able to determine which branch of the if statement you're hitting that cause that to happen by any chance?