Merge branch 'node_modules-robust' of https://github.com/jmm/babel into jmm-node_modules-robust

test/core/fixtures/require-hook/not_node_modules/input.js

@@ -0,0 +1 @@
+() => {};

test/core/require-hook.js

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+var chai        = require("chai");
+
+// Require-hook.
+require("../../lib/babel/api/register/node");
+
+suite("require hook", function () {
+  test("not node_modules", function () {
+    chai.expect(function () {
+      require("./fixtures/require-hook/not_node_modules/input");
+    }).to.not.throw();
+  });
+});