Add github files and templates, update README.

.github/CONTRIBUTING.md

@@ -0,0 +1 @@
+Please see the [Contributor Guidelines on the Wiki](https://github.com/wbobeirne/joule-extension/wiki/Contributor-Guidelines).

.github/ISSUE_TEMPLATE/bug.md

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+---
+name: Bug Report
+about: Something gone wrong? Tell us about it!
+---
+
+<!--
+BEFORE SUBMITTING:
+1) Please search to make sure this issue has not been opened already
+2) If you're looking for help setting up your node, try asking in the LND Slack instead: https://dev.lightning.community/
+-->
+
+### Description of the Issue
+
+[Your description of the bug goes here]
+
+### Steps to Reproduce
+
+[Explain what you did to experience the issue]
+
+### Description of Your Setup
+
+*Browser & version*:
+*Operating system*:
+*Node software & version*:
+
+### Console Logs / Screenshots
+
+[Please provide these if you can!]

.github/ISSUE_TEMPLATE/feature.md

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+---
+name: Feature Request / Idea
+about: Any and all suggestions welcome
+---
+
+<!--
+BEFORE SUBMITTING: Please search to make sure this hasn't already been suggested
+-->
+
+### Description of the Feature or Idea
+
+[Your description goes here]
+
+### Existing Example(s) of Feature
+
+[If another product or app is doing this, please link to it]

.github/PULL_REQUEST_TEMPLATE.md

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+<!-- New to the project? Check out the Contributor Guidelines! -->
+<!-- https://github.com/wbobeirne/joule-extension/wiki/Contributor-Guidelines -->
+
+Closes #(issue number goes here)
+
+### Description
+
+[Description of your changes go here. Please provide both casual and technical explanations.]
+
+### Steps to Test
+
+1. Steps
+2. To
+3. Test
+
+### Screenshots
+
+[Only if applicable]

README.md

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-# Joule Extension for Lightning
+<p align="center">
+<img src="https://camo.githubusercontent.com/ff4a641fba4f90ea2a24413d8874bb464883685d/68747470733a2f2f692e696d6775722e636f6d2f595968594335652e706e67" alt="" data-canonical-src="https://i.imgur.com/YYhYC5e.png" style="max-width:100%;" width="400">
+</p>
+
+## Overview
 
 A chrome extension that lightning-charges your browser with
 [webln](https://github.com/wbobeirne/webln), giving you
@@ -7,6 +11,37 @@ the ability to pay and use your node as an identity on the web.
 **WARNING: Joule is in early alpha, and should not be used for large mainnet funds**
 
 
+## Project Layout
+
+```bash
+joule-extension/
+├── src                   # All source code
+│   ├── app                 # The main React app, used by the other clients
+│   │   ├── index.tsx         # Entry point for the app
+│   │   ├── AppRoutes.tsx     # Routes used in the popup and options clients
+│   │   ├── PromptRoutes.tsx  # Routes used in the prompt client
+│   │   ├── components        # All reusable components
+│   │   ├── lib               # Standalone libraries, potentially split into node modules
+│   │   ├── modules           # Vertical slices of business logic, mostly redux code
+│   │   ├── pages             # Container components for app routes
+│   │   ├── prompts           # Container components for prompts
+│   │   ├── static            # Static assets that are compiled and processed
+│   │   ├── store             # Redux setup and configuration
+│   │   ├── style             # Global or common-use styles
+│   │   ├── typings           # Module typings for TypeScript
+│   │   └── utils             # Miscellanious utility functions and constants
+│   ├── background_script  # Extension background script
+│   ├── content_script     # Extension content script, injects inpage_script and communicates with background_script
+│   ├── inpage_script      # In-page injected script, manages WebLN
+│   ├── options            # Options client, full screen version of the app
+│   ├── popup              # Popup client, opened by clicking icon in toolbar
+│   ├── prompt             # Prompt client, opened by WebLN and BOLT-11 links
+│   └── webln              # WebLN implementation, injected via inpage_script
+├── static             # Static assets that don't go through any processing
+├── dist-dev           # Developer builds go here, not checked into git
+└── dist-prod          # Production builds go here, not checked into git
+```
+
 ## Development
 
 1. Run `yarn install && yarn run dev`
@@ -41,6 +76,10 @@ To make a production build, follow these steps
 
 ...regrettably, TBD
 
+## Contributing
+
+Please see the [Contributor Guidelines on the Wiki](https://github.com/wbobeirne/joule-extension/wiki/Contributor-Guidelines).
+
 ## Shoutouts
 
 * Thanks to the [MetaMask](http://github.com/Metamask) team for establishing