First commit

lib/xler/native.ex

@@ -0,0 +1,8 @@
+defmodule Xler.Native do
+  use Rustler, otp_app: :xler, crate: :xler_native
+
+  def parse(_filename, _worksheet), do: error()
+  def worksheets(_filename), do: error()
+
+  defp error, do: :erlang.nif_error(:nif_not_loaded)
+end