website: Add Outreachy winter 2020 welcome post.

* website/posts/outreachy-winter-2020.md: New file.
* website/static/blog/img/outreachy+guix.png: Add Outreach/Guix logo.

Co-authored-by: Gábor Boskovits <boskovits@gmail.com>.

website/posts/outreachy-winter-2020.md

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+title: Welcome our intern for the Outreachy 2020-2021 round
+date: 2020-11-30 15:30
+author: Gábor Boskovits, Simon Tournier
+tags: Outreachy
+---
+
+We are thrilled to announce that Magali L. Sacramento (IRC: `lemes`) will join Guix
+as an [Outreachy](https://www.outreachy.org) intern over the next few month.
+
+![Outreachy logo](/static/blog/img/outreachy+guix.png)
+
+Magali will work on [adding a
+subcommand](https://lists.gnu.org/archive/html/guix-devel/2020-09/msg00108.html)
+to Guix showing the history of all packages.  This will facilitate the use of
+[`guix
+time-machine`](https://guix.gnu.org/manual/devel/en/guix.html#Invoking-guix-time_002dmachine)
+and inferiors, as it will add support to easily search for a given package
+version on all the defined channels.
+
+Simon Tournier will be the primary mentor, with Gábor Boskovits co-mentoring, and the
+whole community will undoubtedly help and provide guidance, as it has always done.
+
+Welcome, and looking forward to work together!
+
+## About GNU Guix
+
+[GNU Guix](https://www.gnu.org/software/guix) is a transactional package
+manager and an advanced distribution of the GNU system that
+[respects user freedom](https://www.gnu.org/distros/free-system-distribution-guidelines.html).
+Guix can be used on top of any system running the Hurd or the Linux
+kernel, or it can be used as a standalone operating system distribution
+for i686, x86_64, ARMv7, and AArch64 machines.
+
+In addition to standard package management features, Guix supports
+transactional upgrades and roll-backs, unprivileged package management,
+per-user profiles, and garbage collection.  When used as a standalone
+GNU/Linux distribution, Guix offers a declarative, stateless approach to
+operating system configuration management.  Guix is highly customizable
+and hackable through [Guile](https://www.gnu.org/software/guile)
+programming interfaces and extensions to the
+[Scheme](http://schemers.org) language.