clarifies different licensing of book and plugin cookiecutter template (

#99)

* fixes #90

book/intro.md

@@ -79,4 +79,7 @@ Initial support for the development of QIIME 2 was provided through a [grant](ht
 
 ## License
 
-<p xmlns:cc="http://creativecommons.org/ns#" xmlns:dct="http://purl.org/dc/terms/"><a property="dct:title" rel="cc:attributionURL" href="https://github.com/caporaso-lab/developing-with-qiime2/">Developing with QIIME 2</a> by <a rel="cc:attributionURL dct:creator" property="cc:attributionName" href="https://cap-lab.bio">Greg Caporaso and Evan Bolyen</a> is licensed under <a href="https://creativecommons.org/licenses/by-nc-nd/4.0/?ref=chooser-v1" target="_blank" rel="license noopener noreferrer" style="display:inline-block;">CC BY-NC-ND 4.0.<img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/cc.svg?ref=chooser-v1" alt=""><img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/by.svg?ref=chooser-v1" alt=""><img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/nc.svg?ref=chooser-v1" alt=""><img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/nd.svg?ref=chooser-v1" alt=""></a></p>
+<p xmlns:cc="http://creativecommons.org/ns#" xmlns:dct="http://purl.org/dc/terms/"><a property="dct:title" rel="cc:attributionURL" href="https://github.com/caporaso-lab/developing-with-qiime2/">Developing with QIIME 2 (DWQ2)</a> by <a rel="cc:attributionURL dct:creator" property="cc:attributionName" href="https://cap-lab.bio">Greg Caporaso and Evan Bolyen</a> is made available under the <a href="https://creativecommons.org/licenses/by-nc-nd/4.0/?ref=chooser-v1" target="_blank" rel="license noopener noreferrer" style="display:inline-block;">CC BY-NC-ND 4.0 license<img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/cc.svg?ref=chooser-v1" alt=""><img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/by.svg?ref=chooser-v1" alt=""><img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/nc.svg?ref=chooser-v1" alt=""><img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/nd.svg?ref=chooser-v1" alt=""></a>.</p>
+
+The QIIME 2 plugin [cookiecutter template](https://github.com/caporaso-lab/cookiecutter-qiime2-plugin) is made available under the BSD 3-Clause license.
+Unlike DWQ2, derivative works of that template *are* allowed (i.e., you can build real plugins that you intend to distribute for any purpose, including commercial, from the template).