Add CC-by-SA license to readme, other minor readme tweaks

Author: ajpiano

README.md

@@ -8,7 +8,7 @@
 The goal of this site is twofold:
 
 1. To serve as a central, trustworthy, narrative compendium of information about how to use jQuery and JavaScript.
-2. To remain a timely, vibrant, and community-driven reference with a low barrier to contribution.
+2. To remain a timely, vibrant, and community-driven reference with a relatively low barrier to contribution.
 
 Much of the initial content - and spirit - comes from [jQuery Fundamentals](https://github.com/rmurphey/jqfundamentals), an open-source book about jQuery, originally written by [Rebecca Murphey](http://www.rmurphey.com/) and released in 2010. In 2011, Rebecca [bequeathed the book](http://rmurphey.com/blog/2011/03/17/the-future-of-jquery-fundamentals-and-a-confession/) unto the jQuery Foundation to serve as the basis for this site.
 
@@ -19,9 +19,9 @@ This site's core content consists of [Markdown](http://daringfireball.net/projec
 
 ### Site Organization
 
-All of the content lives inside of the subdirectories of the `page` directory. Each of these subdirectories is considered a **category**, and contains one or more **articles**, and there is also a top level file that corresponds to each category, which contains the category's human-readable title and an overview, which will appear on the category's landing page.
+All of the content lives inside of the subdirectories of the `page` directory. Each of these subdirectories is considered a **chapter**, and contains one or more **articles**, and there is also a top level file that corresponds to each chapter, which contains the chapter's human-readable title and an overview, which will appear on the chapter's landing page.
 
-An [`order.yml`](https://github.com/jquery/learn.jquery.com/blob/master/order.yml) file controls the order that categories and articles appear in the site. Categories or articles that do not appear in this file will not be published in the production site.
+The [`order.yml`](https://github.com/jquery/learn.jquery.com/blob/master/order.yml) file controls the order that chapters and articles appear in the site.
 
 
 ### YAML Conventions
@@ -46,7 +46,6 @@ As this site is part of the jQuery network of sites, its presentation is control
 3. Edit config.json to use the username and password for your local WordPress network
 4. `grunt`
 
-
 *Windows note: Line endings need to be Unix-style (line-feed only). Make sure your text editor creates new files with Unix-style line endings. In addition, the following setting to your git config will keep the Unix-style line endings when pulling from the repository.*
 
 ```
@@ -55,5 +54,20 @@ $ git config --global core.autocrlf true
 
 ## How Can I Help?
 
-We encourage contributions from anyone.  We've set up a [CONTRIBUTING.md](contributing.md) page to help with contributing.
-
+We encourage contribution from anyone. For more comprehensive documentation on how to get involved, please read our [contributing guide](http://learn.jquery.com/contributing).
+
+# Copyright & Licensing
+
+This material is Copyright ©2011 The jQuery Foundation and licensed under
+the [Creative Commons Attribution-Share Alike 3.0 United States
+license](http://creativecommons.org/licenses/by-sa/3.0/us/). You are free to
+copy, distribute, transmit, and remix this work, provided you attribute the
+work to The jQuery Foundation as the original author and reference [this
+repository](http://github.com/jquery/learn.jquery.com). If you alter,
+transform, or build upon this work, you may distribute the resulting work only
+under the same, similar or a compatible license. Any of the above conditions
+can be waived if you get permission from the copyright holder. For any reuse or
+distribution, you must make clear to others the license terms of this work. The
+best way to do this is with a link to the [Creative Commons Attribution-Share
+Alike 3.0 United States
+license](http://creativecommons.org/licenses/by-sa/3.0/us/).