Updating summary

Author: Krasimir Tsonev

book/SUMMARY.md

@@ -5,19 +5,36 @@
 ### Foundation
 
 * [Communication](chapter-2/README.md)
+  * [Input](chapter-2/README.md#input)
+  * [Output](chapter-2/README.md#output)
 * [Event handlers](chapter-3/README.md)
 * [Composition](chapter-4/README.md)
+  * [Using React's children API](chapter-4/README.md#using-reacts-children-api)
+  * [Passing a child as a prop](chapter-4/README.md#passing-a-child-as-a-prop)
+  * [Higher-order component](chapter-4/README.md#higher-order-component)
+  * [Function as a children, render prop](chapter-4/README.md#function-as-a-children-render-prop)
 * [Controlled and uncontrolled inputs](chapter-5/README.md)
 * [Presentational and container components](chapter-6/README.md) 
 
 ### Data flow
 
 * [One direction data flow](chapter-7/README.md)
 * [Flux](chapter-8/README.md)
+  * [Flux architecture and its main characteristics](chapter-8/README.md#flux-architecture-and-its-main-characteristics)
+  * [Implementing a Flux architecture](chapter-8/README.md#implementing-a-flux-architecture)
 * [Redux](chapter-9/README.md)
+  * [Redux architecture and its main characteristics](chapter-9/README.md#redux-architecture-and-its-main-characteristics)
+  * [Simple counter app using Redux](chapter-9/README.md#simple-counter-app-using-redux)
 
 ### MISC
 
 * [Dependency injection](chapter-10/README.md)
+  * [Using React's context (prior v. 16.3)](chapter-10/README.md#using-reacts-context-prior-v-163)
+  * [Using React's context (v. 16.3 and above)](chapter-10/README.md#using-reacts-context-v-163-and-above)
+  * [Using the module system](chapter-10/README.md#using-the-module-system)
 * [Styling](chapter-11/README.md)
+  * [The good old CSS class](chapter-11/README.md#the-good-old-css-class)
+  * [Inline styling](chapter-11/README.md#inline-styling)
+  * [CSS modules](chapter-11/README.md#css-modules)
+  * [Styled-components](chapter-11/README.md#styled-components)
 * [Integration of third-party libraries](chapter-12/README.md)

book/chapter-9/README.md

@@ -119,7 +119,7 @@ const mapDispatchToProps = dispatch => ({
 
 `mergeProps` combines both `mapStateToProps` and `mapDispatchToProps` and the props send to the component and gives us the opportunity to accumulate better props. Like for example if we need to fire two actions we may combine them to a single prop and send that to React's component. `options` accepts couple of settings that control how how the connection works.
 
-## Example
+## Simple counter app using Redux
 
 Let's create a simple counter app that uses all the APIs above.