copy(readme): Update Readme

README.md

@@ -1 +1,35 @@
-N1 is a hackable platform for your personal data, built on [Electron](https://github.com/atom/electron) and the [Nylas Platform APIs](https://nylas.com/sync_engine).
+![N1 Logo](https://edgehill.s3.amazonaws.com/static/N1.png)
+
+**An extensible, open-source mail client built on the modern web.**
+
+N1 is a foundation to build new email experiences. It's built on
+[Electron](https://github.com/atom/electron), [React](https://facebook.github.io/react/), and [Flux](https://facebook.github.io/flux/).
+
+We are currently in an invite-only beta. Sign up [here](https://invite.nylas.com)
+to get early access. Star this repository to get even earlier access.
+
+# Getting Started Building Extensions
+
+Everything in N1 is an extension. Building your own is easy.
+
+1. Sign up [here](https://invite.nylas.com) to request an early access token
+1. Use your token to download N1
+1. Follow the getting started guides here to write your first extension in 5 minutes
+
+# Contributing to N1 Core
+
+You currently need an early access token to get setup on N1. Sign up [here](https://invite.nylas.com) to request one.
+
+Once you have a token:
+
+  ```
+  git clone https://github.com/nylas/N1.git
+  cd N1
+  script/bootstrap
+  ./n1 --dev
+  ```
+
+Our early access tokens are designed control access to our production mail sync
+engine while we roll out N1. However, the sync engine is [open
+source](https://github.com/nylas/sync-engine) and you can set it up yourself to
+begin using N1 immediately. Follow instructions on the [sync engine](https://github.com/nylas/sync-engine) repository.