Remove Buffer dependency

[mikolalysenko]

Browserify automatically inserts the buffer polyfill if any instance of Buffer is used. We can avoid this by switching out the references to Buffer in this module, but we need a light weight method to detect if an object is a Buffer.

[hughsk]

https://github.com/feross/is-buffer 😁

[mikolalysenko]

Thanks! Fixed in ndarray@1.0.17