Updated README for better navigational summary

Links to various important sections of README is provided at the top so that it becomes easily navigable.

Author: npathai

README.md

@@ -1,13 +1,31 @@
 # Design pattern samples in Java.
 
-## Build status, coverage and static analysis:
-
 ![Build status](https://travis-ci.org/iluwatar/java-design-patterns.svg?branch=master) [![Coverage Status](https://coveralls.io/repos/iluwatar/java-design-patterns/badge.svg?branch=master)](https://coveralls.io/r/iluwatar/java-design-patterns?branch=master) <a href="https://scan.coverity.com/projects/5634">
   <img alt="Coverity Scan Build Status"
        src="https://scan.coverity.com/projects/5634/badge.svg"/>
 </a>
 
-## Introduction
+ - <a href="#introduction">Introduction</a>
+ - <a href="#list-of-design-patterns">List of Design Patterns</a>
+   - <a href="#creational-patterns">Creational Patterns</a>
+   - <a href="#structural-patterns">Structural Patterns</a>
+   - <a href="#behavioral-patterns">Behavioral Patterns</a>
+   - <a href="#concurrency-patterns">Concurreny Patterns</a>
+   - <a href="#presentation-tier-patterns">Presentation Tier Patterns</a>
+   - <a href="#business-tier-patterns">Business Tier Patterns</a>
+   - <a href="#architectural-patterns">Architectural Patterns</a>
+   - <a href="#integration-patterns">Integration Patterns</a>
+ - <a href="#idioms">Idioms</a>
+ - <a href="#faq">Frequently Asked Questions</a>
+ - <a href="#how-to-contribute">How to contribute</a>
+   - Contributing a new pattern
+   - Working on non-pattern issue
+ - <a href="#versioning">Versioning</a>
+ - <a href="#credits">Credits</a>
+ - <a href="#license">License</a>
+ 
+
+## <a name="introduction">Introduction</a>
 
 Design patterns are formalized best practices that the programmer can use to
 solve common problems when designing an application or system.
@@ -21,7 +39,7 @@ are familiar with the patterns.
 
 ## <a name="list-of-design-patterns">List of Design Patterns</a>
 
-### Creational Patterns
+### <a name="creational-patterns">Creational Patterns</a>
 
 Creational design patterns abstract the instantiation process. They help make a
 system independent of how its objects are created, composed, and represented.
@@ -36,7 +54,7 @@ system independent of how its objects are created, composed, and represented.
 * [Multiton](#multiton)
 * [Object Pool](#object-pool)
 
-### Structural Patterns
+### <a name="structural-patterns">Structural Patterns</a>
 
 Structural patterns are concerned with how classes and objects are composed to
 form larger structures.
@@ -52,7 +70,7 @@ form larger structures.
 * [Servant](#servant)
 * [Event Aggregator](#event-aggregator)
 
-### Behavioral Patterns
+### <a name="behavioral-patterns">Behavioral Patterns</a>
 
 Behavioral patterns are concerned with algorithms and the assignment of
 responsibilities between objects.
@@ -73,7 +91,7 @@ responsibilities between objects.
 * [Specification](#specification)
 * [Dependency Injection](#dependency-injection)
 
-### Concurrency Patterns
+### <a name="concurrency-patterns">Concurrency Patterns</a>
 
 Concurrency patterns are those types of design patterns that deal with the
 multi-threaded programming paradigm.
@@ -83,7 +101,7 @@ multi-threaded programming paradigm.
 * [Async Method Invocation](#async-method-invocation)
 * [Half-Sync/Half-Async](#half-sync-half-async)
 
-### Presentation Tier Patterns
+### <a name="presentation-tier-patterns">Presentation Tier Patterns</a>
 
 Presentation Tier patterns are the top-most level of the application, this is
 concerned with translating tasks and results to something the user can
@@ -94,11 +112,11 @@ understand.
 * [Flux](#flux)
 * [Front Controller](#front-controller)
 
-### Business Tier Patterns
+### <a name="business-tier-patterns">Business Tier Patterns</a>
 
 * [Business Delegate](#business-delegate)
 
-### Architectural Patterns
+### <a name="architectural-patterns">Architectural Patterns</a>
 
 An architectural pattern is a general, reusable solution to a commonly occurring
 problem in software architecture within a given context.
@@ -108,14 +126,14 @@ problem in software architecture within a given context.
 * [Naked Objects](#naked-objects)
 * [Repository](#repository)
 
-### Integration Patterns
+### <a name="integration-patterns">Integration Patterns</a>
 
 Integration patterns are concerned with how software applications communicate
 and exchange data.
 
 * [Tolerant Reader](#tolerant-reader)
 
-### Idioms
+### <a name="idioms">Idioms</a>
 
 A programming idiom is a means of expressing a recurring construct in one or
 more programming languages. Generally speaking, a programming idiom is an
@@ -891,7 +909,7 @@ degrading execution efficiency.
 * [Real Time CORBA](http://www.omg.org/news/meetings/workshops/presentations/realtime2001/4-3_Pyarali_thread-pool.pdf)
 * [Android AsyncTask framework](http://developer.android.com/reference/android/os/AsyncTask.html)
 
-# Frequently asked questions
+# <a name="faq">Frequently asked questions</a>
 
 **<a id="Q1">Q: What is the difference between State and Strategy patterns?</a>**
 
@@ -951,7 +969,7 @@ Flyweight.
 
 
 
-# How to contribute
+# <a name="how-to-contribute">How to contribute</a>
 
 **To work on a new pattern** you need to do the following steps:
 
@@ -989,15 +1007,15 @@ Flyweight.
 should be added to the corresponding section of the `README.md`.
 
 
-# Versioning
+# <a name="versioning">Versioning</a>
 
 Java-design-patterns project uses [semantic versioning](http://semver.org/)
 scheme. However, version numbers in this project do not signify binary releases
 (since we don't make any) but rather milestones achieved on the roadmap. In
 other words, version numbers are used only for project planning sake.
 
 
-# Credits
+# <a name="credits">Credits</a>
 
 * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612)
 * [Effective Java (2nd Edition)](http://www.amazon.com/Effective-Java-Edition-Joshua-Bloch/dp/0321356683)
@@ -1020,6 +1038,6 @@ other words, version numbers are used only for project planning sake.
 * [Marco Castigliego - Step Builder](http://rdafbn.blogspot.co.uk/2012/07/step-builder-pattern_28.html)
 
 
-# License
+# <a name="license">License</a>
 
 This project is licensed under the terms of the MIT license.