Tweak the structure a bit

- Pushed the history near the end of the guide
- Made sure we've got a single top-level heading

Author: bbatsov

README.md

@@ -1,30 +1,9 @@
-# Prelude
+# The Ruby Style Guide
 
 > Role models are important. <br>
 > -- Officer Alex J. Murphy / RoboCop
 
-One thing has always bothered me as a Ruby developer&mdash;Python developers
-have a great programming style reference ([PEP-8][]) and we never got an
-official guide, documenting Ruby coding style and best practices. And I do
-believe that style matters. I also believe that a great hacker community, such
-as Ruby has, should be quite capable of producing this coveted document.
-
-This guide started its life as our internal company Ruby coding guidelines
-(written by yours truly). At some point I decided that the work I was doing
-might be interesting to members of the Ruby community in general and that the
-world had little need for another internal company guideline. But the world
-could certainly benefit from a community-driven and community-sanctioned set of
-practices, idioms and style prescriptions for Ruby programming.
-
-Since the inception of the guide I've received a lot of feedback from members of
-the exceptional Ruby community around the world. Thanks for all the suggestions
-and the support! Together we can make a resource beneficial to each and every
-Ruby developer out there.
-
-By the way, if you're into Rails you might want to check out the complementary
-[Ruby on Rails Style Guide][rails-style-guide].
-
-# The Ruby Style Guide
+## Overview
 
 This Ruby style guide recommends best practices so that real-world Ruby
 programmers can write code that can be maintained by other real-world Ruby
@@ -59,6 +38,9 @@ You can generate a PDF or an HTML copy of this guide using
 [RuboCop][] is a static code analyzer (linter) and formatter, based on this
 style guide.
 
+By the way, if you're into Rails you might want to check out the complementary
+[Ruby on Rails Style Guide][rails-style-guide].
+
 Translations of the guide are available in the following languages:
 
   * [Chinese Simplified](https://github.com/JuanitoFatas/ruby-style-guide/blob/master/README-zhCN.md)
@@ -4608,7 +4590,27 @@ Guide and plugins for most popular Ruby editors and IDEs.
 [partially based](http://confluence.jetbrains.com/display/RUBYDEV/RubyMine+Inspections)
 on this guide.
 
-# Contributing
+## History
+
+One thing has always bothered me as a Ruby developer&mdash;Python developers
+have a great programming style reference ([PEP-8][]) and we never got an
+official guide, documenting Ruby coding style and best practices. And I do
+believe that style matters. I also believe that a great hacker community, such
+as Ruby has, should be quite capable of producing this coveted document.
+
+This guide started its life as our internal company Ruby coding guidelines
+(written by yours truly). At some point I decided that the work I was doing
+might be interesting to members of the Ruby community in general and that the
+world had little need for another internal company guideline. But the world
+could certainly benefit from a community-driven and community-sanctioned set of
+practices, idioms and style prescriptions for Ruby programming.
+
+Since the inception of the guide I've received a lot of feedback from members of
+the exceptional Ruby community around the world. Thanks for all the suggestions
+and the support! Together we can make a resource beneficial to each and every
+Ruby developer out there.
+
+## Contributing
 
 The guide is still a work in progress&mdash;some rules are lacking examples,
 some rules don't have examples that illustrate them clearly enough. Improving
@@ -4628,16 +4630,14 @@ advance for your help!
 You can also support the project (and RuboCop) with financial
 contributions via [Patreon](https://www.patreon.com/bbatsov).
 
-## How to Contribute?
-
 It's easy, just follow the [contribution guidelines](https://github.com/rubocop-hq/ruby-style-guide/blob/master/CONTRIBUTING.md).
 
-# License
+## License
 
 ![Creative Commons License](http://i.creativecommons.org/l/by/3.0/88x31.png)
 This work is licensed under a [Creative Commons Attribution 3.0 Unported License](http://creativecommons.org/licenses/by/3.0/deed.en_US)
 
-# Spread the Word
+## Spread the Word
 
 A community-driven style guide is of little use to a community that
 doesn't know about its existence. Tweet about the guide, share it with