Support Vim, Tmux, Emacs with Stow

After moving off of Meta, Dotfiles has a greater responsibility to
manage configs. Vim, Tmux, and Emacs are now within Stow's purview.

configs/shared/emacs/.emacs.d/snippets/rjsx-mode/react-class-component

@@ -0,0 +1,11 @@
+# -*- mode: snippet -*-
+# name: React class extends
+# key: clz
+# --
+class $1 extends React.Component {
+  render() {
+    $2
+  }
+}
+
+export default $1