Update self_contained_networks.html correctly to cardv2 (#1467)

* Fix margins
* Add platform links
* Update I2P logo

_includes/sections/self-contained-networks.html

@@ -4,8 +4,6 @@
   <strong>If you are currently browsing <a href="https://en.wikipedia.org/wiki/Surface_Web">clearnet</a> and want to access the <a href="https://en.wikipedia.org/wiki/Dark_web">dark web</a>, this section is for you.</strong>
 </div>
 
-<div class="row mb-2">
-
 {% include cardv2.html
 title="Tor"
 image="/assets/img/tools/Tor-Project.png"
@@ -13,16 +11,35 @@ description="The Tor network is a group of volunteer-operated servers that allow
 website="https://www.torproject.org/"
 tor="http://expyuzz4wqqyqhjn.onion"
 forum="https://forum.privacytools.io/t/discussion-tor/1589"
+windows="https://www.torproject.org/download/"
+mac="https://www.torproject.org/download/"
+linux="https://www.torproject.org/download/"
+freebsd="https://www.freshports.org/security/tor"
+openbsd="http://openports.se/net/tor"
+netbsd="http://pkgsrc.se/net/tor"
+fdroid="https://support.torproject.org/tormobile/tormobile-7/"
+googleplay="https://play.google.com/store/apps/details?id=org.torproject.torbrowser"
+android="https://www.torproject.org/download/#android"
 git="https://gitweb.torproject.org/tor.git"
 %}
 
 {% include cardv2.html
 title="I2P Anonymous Network"
 image="/assets/img/tools/I2P.png"
+image-dark="/assets/img/tools/I2P-dark.png"
 description="The Invisible Internet Project (I2P) is a computer network layer that allows applications to send messages to each other pseudonymously and securely. Uses include anonymous Web surfing, chatting, blogging, and file transfers. The software that implements this layer is called an I2P router and a computer running I2P is called an I2P node. The software is free and open-source and is published under multiple licenses."
 website="https://geti2p.net/"
 forum="https://forum.privacytools.io/t/discussion-i2p/1590"
-github="https://github.com/i2p/"
+windows="https://geti2p.net/en/download#windows"
+mac="https://geti2p.net/en/download#mac"
+linux="https://geti2p.net/en/download#unix"
+freebsd="https://www.freshports.org/security/i2p/"
+openbsd="http://openports.se/net/i2pd"
+netbsd="http://pkgsrc.se/wip/i2pd"
+fdroid="https://f-droid.org/app/net.i2p.android.router"
+googleplay="https://play.google.com/store/apps/details?id=net.i2p.android"
+android="https://download.i2p2.de/android/current/"
+source="https://geti2p.net/en/get-involved/guides/new-developers#getting-the-i2p-code"
 %}
 
 {% include cardv2.html
@@ -31,11 +48,15 @@ image="/assets/img/tools/Freenet.png"
 description="Freenet is a peer-to-peer platform for censorship-resistant communication. It uses a decentralized distributed data store to keep and deliver information, and has a suite of free software for publishing and communicating on the Web without fear of censorship. Both Freenet and some of its associated tools were originally designed by Ian Clarke, who defined Freenet's goal as providing freedom of speech on the Internet with strong anonymity protection."
 website="https://freenetproject.org/"
 forum="https://forum.privacytools.io/t/discussion-freenet/1591"
+windows="https://freenetproject.org/pages/download.html#windows"
+mac="https://freenetproject.org/pages/download.html#os-x"
+linux="https://freenetproject.org/pages/download.html#gnulinux-posix"
+freebsd="https://freenetproject.org/pages/download.html#gnulinux-posix"
+openbsd="https://freenetproject.org/pages/download.html#gnulinux-posix"
+netbsd="https://freenetproject.org/pages/download.html#gnulinux-posix"
 github="https://github.com/freenet/"
 %}
 
-</div>
-
 <h3>Related Information</h3>
 
 <ul>