Unknown extension type "DS_Store"

[saurabhnanda]

It's a hidden file created by Mac OS in many directories. I can be safely ignored for the purpose of this library.

[cdepillabout]

Thanks for submitting this.

I'd be happy to accept a PR for this.

[cdepillabout]

It would be nice to expose to the user some sort of functionality for ignoring arbitrary files.

This might be somewhat similar to how .gitignore files work.

edit: Oh, whoops. It looks like there is already an issue open for this: #9.

I'll go ahead and close this issue in favor of #9.