Add mission statement v1

MISSION.md

@@ -0,0 +1,14 @@
+# MetaMask Philosophy
+
+## Mission
+
+Making it safe and easy to use the decentralized web.
+
+## Vision
+
+To realize the highest goals achievable for the human race with the twin powers of peer to peer networks and cryptography.  To empower users to hold and use their own keys on these new networks as securely and intelligibly as possible, enabling a new world of peer to peer agreements and economies, in hopes that we may collectively overcome the many great problems that we face together, through the power of strong cooperation.
+
+## Strategy
+
+We provide software for users to manage accounts, for sites to easily propose actions to users, and for users to coherently review actions before approving them. We build on this rapidly evolving set of protocols with the goal of continuously empowering the most people to the greatest degree.
+

README.md

@@ -1,12 +1,16 @@
 # MetaMask Browser Extension
 [![Build Status](https://circleci.com/gh/MetaMask/metamask-extension.svg?style=shield&circle-token=a1ddcf3cd38e29267f254c9c59d556d513e3a1fd)](https://circleci.com/gh/MetaMask/metamask-extension) [![Coverage Status](https://coveralls.io/repos/github/MetaMask/metamask-extension/badge.svg?branch=master)](https://coveralls.io/github/MetaMask/metamask-extension?branch=master) [![Greenkeeper badge](https://badges.greenkeeper.io/MetaMask/metamask-extension.svg)](https://greenkeeper.io/) [![Stories in Ready](https://badge.waffle.io/MetaMask/metamask-extension.png?label=in%20progress&title=waffle.io)](https://waffle.io/MetaMask/metamask-extension)
 
-[Internal documentation](./docs/jsdocs)
-
 ## Support
 
 If you're a user seeking support, [here is our support site](https://metamask.helpscoutdocs.com/).
 
+## Introduction
+
+[Mission Statement](./MISSION.md)
+
+[Internal documentation](./docs/jsdocs)
+
 ## Developing Compatible Dapps
 
 If you're a web dapp developer, we've got two types of guides for you: