Implements FileSystem.createNonRecursive to enable HBase operation.

Hey there!

Thanks for open sourcing such a cool project!  I've been hacking around a bit with QFS in my spare time, and I'd like to send you a few pull requests to see if you'd find them useful.

This first one implements the FileSystem.createNonRecursive call which is needed by HBase for operation, and with this in place I was able to stand up an HBase 0.90.6 instance against QFS.

Let me know what you think, and thanks for the consideration!