README.md: add content

README.md

@@ -1,2 +1,36 @@
-# tailscale
-Tailscale
+# Tailscale
+
+http://tailscale.com
+
+Private WireGuard® networks made easy
+
+## Overview
+
+This repository contains all the open source Tailscale code.
+It currently includes the Linux client.
+
+The linux client is currently `cmd/relaynode`, but will
+soon be replaced by `cmd/tailscaled`.
+
+## Building
+
+```
+go install tailscale.com/cmd/tailscale{,d}
+```
+
+## Bugs
+
+Please file any issues on the GitHub issue tracker.
+
+## Contributing
+
+PRs welcome, but we are still working out our contribution process.
+
+`under_construction.gif`
+
+## About Us
+
+We are apenwarr, bradfitz, crawshaw, danderson, dfcarney,
+from Tailscale Inc. You can learn more about us from our website.
+
+WireGuard is a registered trademark of Jason A. Donenfeld.