Add a simple readme file

Author: hartwork

README.md

@@ -0,0 +1,38 @@
+# About
+
+I made these slides for a talk called
+`Python JSON Emoji Crash Story` at
+[Django User Group Berlin](https://www.meetup.com/de-DE/django-user-group-berlin)
+on
+[2020-02-18](https://www.meetup.com/de-DE/django-user-group-berlin/events/qptdkrybcdbxb/).
+The slide sources are licensed under
+[CC-BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/).
+
+
+# Related links
+
+- https://github.com/encode/django-rest-framework/pull/7067
+
+- https://github.com/encode/django-rest-framework/issues/7026
+
+- https://docs.python.org/3/library/json.html#character-encodings
+
+- https://github.com/hartwork/surrogates
+
+
+# Rendering slides to PDF
+
+Viewing and rendering takes
+[GNOME pinpoint](https://gitlab.gnome.org/Archive/pinpoint/)
+version 0.1.8; it has a
+[package in Debian](https://packages.debian.org/sid/pinpoint).
+
+Slides can then be rendered to PDF…
+```console
+# pinpoint -o python-json-emoji-crash-story-2020-02-18-v2.pdf slides.pin
+```
+
+…or browsed interactively:
+```console
+# ./slides.pin
+```