Update README.md with simple example and ready() (#291)

* Update README.md with simple example and ready()

Added simple code example to get started and a  note about calling the ready() function for the library to be usable.

* Prettier formatting fixes to README

* Update README.md with randomPasscode

randomPasscode added to example to make new users aware.

* Update README.md

removed erroneous comment.

README.md

@@ -40,10 +40,31 @@ The code is built using Typescript and running code locally requires a Mac or Li
 Typescript source files needs to be transpiled before running scripts or integration tests
 
 -   Build:
+
     ```bash
     npm run build
     ```
 
+-   ready() must be called before library is useable. Example minimum viable client code.
+
+    ```javascript
+    import { randomPasscode, ready, SignifyClient, Tier } from 'signify-ts';
+
+    await ready();
+
+    const bran = randomPasscode();
+    const url = 'http://127.0.0.1:3901';
+    const boot_url = 'http://127.0.0.1:3903';
+    const actualSignifyClient = new SignifyClient(
+        url,
+        bran,
+        Tier.low,
+        boot_url
+    );
+
+    console.log(actualSignifyClient);
+    ```
+
 ### Unit testing
 
 To run unit tests