Update the getting started commands.

Doing an `npm install bitcore-wallet-service` wouldn't install the project in the directory since there is no `package.json` file. It should rather be a `git clone` and then `cd bitcore-wallet-service && npm start`.

README.md

@@ -19,10 +19,10 @@ BWS is been used in production enviroments for [Copay Wallet](https://copay.io),
 
 More about BWS at https://blog.bitpay.com/announcing-the-bitcore-wallet-suite/
 
-# Install
+# Get Started
 ```
- npm install bitcore-wallet-service
+ git clone https://github.com/bitpay/bitcore-wallet-service.git
- npm start
+ cd bitcore-wallet-service && npm start
 ```
 
 This will launch the BWS service (with default settings) at `http://localhost:3232/bws/api`.