Feature hugo migration

This MR converts the existing website into a hugo website.

• Converting existing pages into a hugo website
• Existing .html links should work
• Atom feed: Still has validation errors
• html5: Fix all validation errors
• Hide emails from spam bots
• rel="noreferrer" attribute missing on all links
• rel="noopener" attribute missing on all links

Have a look at README.md how to test it with hugo's internal webserver.

This is my very first MR - feedback is very welcome.

If this is not the right way to review and discuss, please let me know.

Closes #1 (closed)

content/page/about.md

@@ -29,22 +29,32 @@ security and privacy. He's contributing to Briar in his spare time and
 is working on a funded project to improve Briar's battery usage and
 message delivery even when contacts are not online at the same time.
 
+**Benedikt Wieder** has contributed to a variety of open source projects
+ranging from artistic tools to security applications. During his
+bachelor studies in Computer Science he researched and worked with
+variations of the Kademlia distributed hash table (DHT) and the Session
+Initiation Protocol (SIP) for use in secure communication.
+
+#### Past Contributors
+
 **Ernir Erlingsson** has been building mobile applications on multiple
 platforms for over a decade. He is a full stack developer, and an avid
 supporter of open-source software, with a keen interest in theoretical
 computer science and algorithms.
 
-**Bernard Tyers** is an independent interaction designer and user
-researcher. He is interested in privacy and applying user-centred design
-to usable security. He is a long-time supporter of the Open Rights
-Group, Tor and free software projects.
-
 **Jack Grigg** is a core developer of the I2P anonymity network and lead
 developer of I2P Android. He has a keen interest in privacy and
 anonymity research, and enjoys helping other developers create
 privacy-respecting software. He is also a budding UX enthusiast and
 holds a PhD in Applied Physics from Lincoln University, New Zealand.
 
+**Bernard Tyers** is an independent interaction designer and user
+researcher. He is interested in privacy and applying user-centred design
+to usable security. He is a long-time supporter of the Open Rights
+Group, Tor and free software projects.
+
+#### Funding
+
 Briar has received funding from [Small
 Media](https://smallmedia.org.uk/), the [Open Internet Tools
 Project](https://web.archive.org/web/20160413063937/https://www.openitp.org/),
@@ -53,4 +63,6 @@ Fund](https://www.opentech.fund/), the [Prototype
 Fund](https://prototypefund.de/), and
 [Internews](https://www.internews.org/).
 
+#### Contact
+
 To contact the team, please email {{<contactemail>}}.