Start writing some docs, in particular, an "intro to Mojo".
It's still mostly an outline (though I did write some stuff about
message pipes).
R=vardhan@google.com
Review URL: https://codereview.chromium.org/1751233002 .
diff --git a/docs/README.md b/docs/README.md
new file mode 100644
index 0000000..597fdbe
--- /dev/null
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@@ -0,0 +1,13 @@
+# Documents
+
+This directory (tree) contains documentation about Mojo.
+
+* [Introduction to Mojo](intro/intro.md)
+
+## Notes
+
+Documentation under this directory should be in Markdown whenever possible. It
+should generally adhere to the [Google documentation
+guide](https://github.com/google/styleguide/tree/gh-pages/docguide), including
+in particular the [Markdown style
+guide](https://github.com/google/styleguide/blob/gh-pages/docguide/style.md).
