Add an app-internal about page for the project.

We will want to link to this from at least the portico.

templates/zerver/about.html

@@ -0,0 +1,123 @@
+{% extends "zerver/portico.html" %}
+{% block portico_content %}
+
+<h1>About Zulip</h1>
+
+<p>
+  This server is an installation of
+  the <a href="https://zulip.org">Zulip open source group chat
+  software</a>.  Written in Python and using the Django web framework,
+  Zulip has an extensive real-time messaging featureset, including
+  both group and private messaging, conversation streams, powerful
+  search, drag-and-drop file uploads, image previews, audible
+  notifications, missed-message emails, markdown formatting, desktop
+  and mobile apps, dozens of integrations, and much, much more.
+</p>
+
+<p>
+  Zulip was designed from the ground up to optimize the productivity
+  of discussions and real-time decision-making.  Zulip's unique model
+  for threading topics, together with its system for tracking unread
+  messages, make it easy to have multiple simultaneous conversations
+  in the same stream.  As a result, Zulip is more efficient than any
+  other chat product for catching up on conversations you missed while
+  you were away from your devices.  You can read exactly the threads
+  that are important to you, and it feels natural to follow up on
+  conversations that happened while you were away.
+</p>
+
+<p>
+  Zulip's vision is to create the world's best group chat software,
+  completely open source, so that everyone has the freedom to
+  customize, improve, and run their own copy of this essential piece
+  of collaboration infrastructure.
+</p>
+
+<p>
+  Further information on the Zulip project and <a href="/features">its
+  features</a> can be found on
+  the <a href="https://www.zulip.org">Zulip open source project's
+  website</a> and
+  the <a href="http://zulip.readthedocs.io/en/latest/">Zulip
+  documentation</a>.
+</p>
+
+<h2>Zulip Community</h2>
+
+<p>
+  Zulip is developed by a vibrant community of developers from around
+  the world.  Every month, dozens of people contribute code to it, and
+  dozens more contribute bug reports, feedback, and translations.  The
+  Zulip community welcomes new contributors from any background.  The
+  project has an easy to install development environment, an extensive
+  test suite,
+  and <a href="http://zulip.readthedocs.io/en/latest/">over 50,000
+  words of developer documentation</a> to make it easy for new
+  contributors to contribute effectively to the project.
+</p>
+
+<h3>Contributing to Zulip</h3>
+
+<p>
+  If you'd like to join the Zulip community, we'd love to have you!
+  Please
+  visit <a href="https://github.com/zulip/zulip/#zulip-overview">the
+  main Zulip project on GitHub</a> for details on how to get involved!
+</p>
+
+<h2>Zulip history</h2>
+
+<p>
+  Zulip was originally developed by Zulip, Inc., a small startup in
+  Cambridge, Massachusetts.  Zulip, Inc. was founded by the MIT team
+  that previously created
+  <a href="https://www.ksplice.com">Ksplice</a>, software for
+  live-patching a running Linux kernel.  Zulip was inspired by
+  the <a href="https://barnowl.mit.edu/">Barnowl</a> client for
+  the <a href="https://en.wikipedia.org/wiki/Zephyr_(protocol)">Zephyr</a>
+  protocol, and the incredible community that Zephyr supported at MIT.
+</p>
+
+<p>
+  Zulip, Inc. was acquired by Dropbox in early 2014, while the product
+  was still in private beta.  Zulip's beta
+  users <a href="https://www.recurse.com/blog/90-zulip-supporting-oss-at-the-recurse-center">loved
+  Zulip's unique user experience</a> and continued using it, despite
+  the fact that the product was not being actively developed.  After a
+  year and a half, Dropbox generously decided to release Zulip as open
+  source software so that Zulip's users could continue enjoying the
+  software.
+</p>
+
+<p>
+  As a result, the first time the public had the opportunity to use
+  Zulip was when Dropbox
+  <a href="https://blogs.dropbox.com/tech/2015/09/open-sourcing-zulip-a-dropbox-hack-week-project/">released
+  Zulip as open source software</a> in late 2015.  The open sourcing
+  announcement was very popular, staying at the top of
+  both <a href="https://news.ycombinator.com/item?id=10279961">Hacker
+  News</a>
+  and <a href="https://www.reddit.com/r/programming/comments/3me9qp/dropbox_has_open_sourced_zulip_group_chat_software/">the
+  programming subreddit</a> for an entire day.
+</p>
+
+<p>
+  Zulip was open sourced with the complete version control history
+  intact because 10 Zulip users visited Dropbox for a full week to
+  help with the technical work.  The Zulip community is incredibly
+  grateful to both Dropbox and those enthusiastic early users for
+  making the Zulip open source project possible.
+</p>
+
+<p>
+  By the end of 2015, the open source project was already going strong
+  with a community of dozens of developers around the world.  As of
+  late-2016, <a href="https://en.wikipedia.org/wiki/Zephyr_(protocol)">more
+  than 150 people from all over the world</a> have contributed
+  <a href="https://github.com/zulip/zulip/pulls">almost 1000
+  improvements</a> to the software, and the Zulip project is moving
+  faster than when the original startup employed 11 full-time
+  engineers.
+</p>
+
+{% endblock %}

zproject/urls.py

@@ -96,6 +96,7 @@ i18n_urls = [
     url(r'^api/$', TemplateView.as_view(template_name='zerver/api.html')),
     url(r'^api/endpoints/$', 'zerver.views.api_endpoint_docs'),
     url(r'^integrations/$', IntegrationView.as_view()),
+    url(r'^about/$', TemplateView.as_view(template_name='zerver/about.html')),
     url(r'^apps/$', TemplateView.as_view(template_name='zerver/apps.html')),
 
     url(r'^robots\.txt$', RedirectView.as_view(url='/static/robots.txt')),