Removed the Markdown Plus custom heading id's

Because the renderer of github doesnt support markdown plus...

README.md

@@ -9,7 +9,7 @@
 [![Coverity Scan Build Status](https://scan.coverity.com/projects/5634/badge.svg)](https://scan.coverity.com/projects/5634)
 [![Join the chat at https://gitter.im/iluwatar/java-design-patterns](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/iluwatar/java-design-patterns?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
-# Introduction {#intro}
+# Introduction
 
 Design patterns are formalized best practices that the programmer can use to
 solve common problems when designing an application or system.
@@ -21,12 +21,11 @@ Reusing design patterns helps to prevent subtle issues that can cause major
 problems, and it also improves code readability for coders and architects who
 are familiar with the patterns.
 
-
-# How to contribute {#contribute}
+# How to contribute
 
 If you are willing to contribute to the project you will find the relevant information in our [developer wiki](https://github.com/iluwatar/java-design-patterns/wiki).
 
-# Credits {#credits}
+# Credits
 
 * [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)
@@ -40,7 +39,6 @@ If you are willing to contribute to the project you will find the relevant infor
 * [J2EE Design Patterns](http://www.amazon.com/J2EE-Design-Patterns-William-Crawford/dp/0596004273/ref=sr_1_2)
 * [Pattern Oriented Software Architecture Vol I-V](http://www.amazon.com/Pattern-Oriented-Software-Architecture-Volume-Patterns/dp/0471958697)
 
-
-# License {#license}
+# License
 
 This project is licensed under the terms of the MIT license.