Fixing pluralization error

"a core value" instead of "a core values"
Merge pull request #13 from caffeinewriter/master

Fixing pluralization error
Update Readme.md

Loop referenced items when looping over key array
Merge pull request #14 from tanepiper/master

Update Readme.md
Clarify where to use var statements

Closes #16
Update Readme.md

Fixed === operator example
Merge pull request #17 from coderangerdan/patch-1

Update Readme.md
Added relevant .jshintrc

Tried to match the style as closely as I could with the [JSHint Options](http://www.jshint.com/docs/options/). Used a [fun little script](https://gist.github.com/kentcdodds/11293570) to make this easier.
Merge pull request #18 from kentcdodds/master

Added relevant .jshintrc