Add ZeroNet (#1166)

* Add ZeroNet

Added ZeroNet to satisfy issue #919. Self-hosting solutions is the best category due to its use for distributing websites. This is a hybrid self-hosted application, as it utilizes the BitTorrent network.

* Fixed formatting.

Fixed formatting, line break.

* Move ZeroNet to Communication > Custom

README.md

@@ -253,6 +253,7 @@ Some [Groupware](#groupware) solutions also feature calendar/address book editin
   * [TextBelt](https://github.com/typpo/textbelt) `⚠` - An outgoing SMS API that uses carrier-specific gateways to deliver your text messages for free, and without ads. `MIT` `Javascript`
   * [Tox](https://tox.chat/) - A distributed, secure messenger with audio and video chat capabilities. ([Source Code](https://github.com/irungentoo/toxcore)) `GPLv3` `C`
   * [Tuber](https://blog.trailofbits.com/2015/12/15/self-hosted-video-chat-with-tuber/) - Peer-to-peer video chat that works. ([Source Code](https://github.com/trailofbits/tubertc)) `MIT` `Javascript`
+  * [ZeroNet](https://zeronet.io/) `⚠` - Open, free, and uncensorable websites, using Bitcoin cryptography and BitTorrent network. ([Source Code](https://github.com/HelloZeroNet/ZeroNet)) `GNU` `Python`
   * [Zulip](https://zulip.org) - Zulip is a powerful, open source group chat application. ([Source Code](https://github.com/zulip/zulip)) `Apache/Other` `Python`
 
 ### Email
@@ -1246,7 +1247,6 @@ See also [Documentation Generators](#documentation-generators), [Wikimatrix](htt
   * [WikiSuite](http://WikiSuite.org) - The most comprehensive and integrated Free / Libre / Open Source software suite ever developed. ([Source Code](http://wikisuite.org/Source)) `Multiple` `ClearOS`
   * [YunoHost](https://yunohost.org/) - A server operating system aiming to make self-hosting accessible to everyone. ([Demo](https://yunohost.org/#/try), [Source Code](https://github.com/YunoHost)) `AGPLv3` `Python/Other`
 
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