more architectural changes

packages/babel-cli/test/tmp/not_node_modules.jsx

@@ -0,0 +1,10 @@
+/*
+The purpose of this file is to test that the node_modules check in the require
+hook doesn't mistakenly exclude something like "not_node_modules". To pass, this
+file merely needs to be transpiled. The transpiled code won't, and doesn't need
+to, execute without error. It won't execute because React will be undefined.
+*/
+try {
+  <Some jsx="element" />;
+}
+catch (e) {}