Added props to Readme

Author: Shamin Meerankutty

README.md

@@ -23,3 +23,12 @@ class App extends React.Component {
 
 export default App;
 ```
+
+
+## Props
+
+Name | Type | Default Value
+------------ | ------------- | -------------
+loading | boolean | false
+background | String  | `rgba(236, 240, 241, 0.7)`
+loaderColor | String  | `#e74c3c`