Update index_template.html

Tweaked Feedback and Contributions text. 
- Added links to repo, create a new issue, and list of open issues.
- Removed text that referred to link on top of each tutorial to repo. As far as i can tell, that link doesnt exist.

Author: kelle

templates/index_template.html

@@ -43,9 +43,11 @@ <h2>Tutorial Index</h2>
     </section>
 
     <section> 
-    <p>If you are a user interested in contributing a tutorial, please check the <a href="https://github.com/astropy/astropy-tutorials/blob/master/README.rst">README</a> or contact the <a href="https://groups.google.com/forum/#!forum/astropy-dev">developer list</a>. The tutorials are not meant to be written by developers; we are looking for contributions from users like you!</p>
 
-        <p>We welcome feedback about existing tutorials through GitHub. At the top of each tutorial is a link that takes you to the Astropy Tutorials issues list. If you find a typo or would like to clarify some text, please either create an issue or submit a pull request directly to the repository. To discuss tutorial content, consider sending your questions / comments to the <a href="https://groups.google.com/forum/#!forum/astropy-dev">astropy-dev</a> mailing list.</p>
+        <p>We welcome <b>feedback</b> and improvements to these tutorials via the <a href="https://github.com/astropy/astropy-tutorials">Astropy Tutorials repo on Github</a>. If you find a typo or would like to clarify some text, please either <a href="https://github.com/astropy/astropy-tutorials/issues/new">create an issue</a> or make the change yourself and then submit a pull request directly to the <a href="https://github.com/astropy/astropy-tutorials">repository</a>. Questions and/or comments about the tutorials are welcome on the <a href="https://groups.google.com/forum/#!forum/astropy-dev">astropy-dev</a> mailing list.</p>
+
+        <p>If you are interested in <b>contributing</b> an ipython notebook as a tutorial, please check the <a href="https://github.com/astropy/astropy-tutorials/blob/master/README.rst">README</a> or contact the <a href="https://groups.google.com/forum/#!forum/astropy-dev">developer list</a>. Also, if you have an idea for a tutorial or a tutorial request, please post to the <a href="https://groups.google.com/forum/#!forum/astropy-dev">developer list</a>. If you would like to contribute to this effort, but need some inspiration, check out the <a href="https://github.com/astropy/astropy-tutorials/issues?page=1&state=open">open issues</a>. This is a collaborative effort and we are looking for contributions and ideas from users like you!</p>
+    
 </section>
 
 </div>