Remove .DS_Store files

Thanks for this branch. It still doesn't work for me at the moment (investigating) but for now, these .DS_Store files should be removed.

Also, if you haven't setup your global gitignore, this is a great starting point:

https://github.com/github/gitignore/blob/master/Global/OSX.gitignore

also, yes i do have a opscode cla signed.