add subscription forms for the mailing lists

content/community.txt

@@ -8,32 +8,46 @@ The mailing list is (meant to become) the main communication platform for
 anything related to Kwant: asking questions, reporting bugs, and discussing
 further development.  You can use it in various ways:
 
-- `Subscribe <https://mailman-mail5.webfaction.com/listinfo/kwant-discuss>`_ and
-  use it along with your regular email.  (You can unsubscribe at any moment.)
+- .. raw:: html
+
+     <form method=post action="https://mailman-mail5.webfaction.com/subscribe/kwant-discuss">
+     <input type="text" name="email" size=25 value="Your email" onblur="if (this.value == '') {this.value='Your email'}" onfocus="if (this.value == 'Your email') {this.value=''}" />
+     <input type="submit" name="email-button" value="Subscribe to the mailing list" />
+     </form>
+
+  … and read it together with your regular email.  (To unsubscribe, follow the
+  link in the footer of a message.)
 
-- Follow through the `Gmane web interface
-  <http://news.gmane.org/gmane.comp.science.kwant.user>`_.  It is both possible
-  to write new messages (action: post) and to reply (action: followup).
+- Read the list via the `Gmane web interface
+  <http://news.gmane.org/gmane.comp.science.kwant.user>`_.  The web interface
+  allows to write new messages (action: post) and to reply (action: followup).
 
 - .. raw:: html
 
       <p><form id="searchgmane" method="get" action="http://search.gmane.org/">
-      <input type="text" name="query" />
+      <input type="text" size=25 name="query" />
       <input type="hidden" name="group" value="gmane.comp.science.kwant.user" />
-      <input type="submit" value="Search the Kwant mailing list" />
+      <input type="submit" value="Search the mailing list" />
       </form></p>
 
 - Send a message directly to kwant-discuss@kwant-project.org.  (If you are not
-  subscribed, it is not guaranteed that any replies will reach you by email.)
+  subscribed, it is not guaranteed that any followups will reach you by email,
+  so you should ask to be CCed.)
 
 
 Announcements of new releases
 -----------------------------
 
-If you would like to be notified about new releases of Kwant and other important
-things relevant for its users, please subscribe to the `announcements mailing
-list <https://mailman-mail5.webfaction.com/listinfo/kwant-announce>`_.  This
-list is read-only and only a few messages will be sent through it per year.
+This read-only list is reserved for important announcements like new releases of
+Kwant.  Only a few messages will be sent per year.  We recommend every user of
+Kwant to subscribe to it in order to stay informed about new developments.
+
+.. raw:: html
+
+   <form method=post action="https://mailman-mail5.webfaction.com/subscribe/kwant-announce">
+   <input type="text" name="email" size=25 value="Your email" onblur="if (this.value == '') {this.value='Your email'}" onfocus="if (this.value == 'Your email') {this.value=''}" />
+   <input type="submit" name="email-button" value="Subscribe to announcements" />
+   </form>
 
 
 Reporting bugs