Update README "Requirements" for more clarity

Providing additional clarity on the requirements of Zap wallet. This breaks it out into what is needed to compile just Zap and what is needed to actually use the wallet.

README.md

@@ -8,14 +8,23 @@
 
 Zap is a free Lightning Network wallet focused on user experience and ease of use, with the overall goal of helping the cryptocurrency community scale Bitcoin and other cryptocurrencies.
 
-Zap is built on top of [LND](https://github.com/lightningnetwork/lnd), and uses
-[Electron](https://electron.atom.io/) + [React](https://facebook.github.io/react/) + [Redux](https://github.com/reactjs/redux/tree/master/docs) for the UI.
+The UI for Zap is created using
+[Electron](https://electron.atom.io/) + [React](https://facebook.github.io/react/) + [Redux](https://github.com/reactjs/redux/tree/master/docs).
 
 Join us on [slack](https://join.slack.com/t/zaphq/shared_invite/enQtMjkyNTAxNDA3MjE2LWE3NGZjZGE5ZmI1NGQ5YTk3MGQzMTdmNDAwYjNhZTJkMWU0ZWZlNzA0MjJiNDBjMzcxYjcyMDMxNWY3OGNhYWQ) to discuss development, design and product
 
 ## Requirements
 
-* **Node.js version >= 8, npm version >= 5 and [yarn](https://yarnpkg.com/lang/en/docs/install/)**
+To compile just the Zap wallet, you will need:
+
+- **Node.js version >= 8**
+- **npm version >= 5**
+- **[yarn](https://yarnpkg.com/lang/en/docs/install/)**
+
+To use the Zap wallet, you will need:
+
+- **[Lightning Network Daemon (lnd)](https://github.com/lightningnetwork/lnd)**
+- **[btcd (roasbeef fork)](https://github.com/roasbeef/btcd)**
 
 ## Install