update README

README.md

@@ -1,10 +1,10 @@
 # React FHIR Client
 
-> React Hooks for fhirclient. Use fhirclient with an easy react hook.
+> React Hooks for fhirclient. Use fhirclient with an easy React Hook.
 
 ## Getting started
 
-1. Add your `FhirClientProvider` to your ReactDOM tree
+1. Add your `FhirClientProvider` to your ReactDOM tree.
 
 ```js
 ReactDOM.render(
@@ -17,7 +17,7 @@ ReactDOM.render(
 );
 ```
 
-2. Use `useFhirClient()` in your hooks
+2. Use `useFhirClient()` in your hooks.
 
 ```js
 import { useState, useEffect } from 'react';
@@ -47,4 +47,8 @@ function App() {
 }
 
 export default App;
-```
+```
+
+3. Learn `fhirclient`.
+
+This project uses [fhirclient](https://github.com/smart-on-fhir/client-js) under the hood. Check out it's [documentation](http://docs.smarthealthit.org/client-js/).