add static version of slides

gen-static-slides-bundle.mk

+#!/usr/bin/make -f
+# Generates a tar with all files needed to view the HTML presetnation properly
+# -Andreas Herten, 2021 May 26
+.PHONY: all
+all: static-slides-bundle.tar.gz
+
+SOURCES=Introduction-to-Pandas--slides.html img/ fzj-reveal.js/img/ fzj-reveal.js/reveal.js fzj-reveal.js/custom.css fzj-reveal.js/fzj.js
+
+static-slides-bundle.tar.gz: gen-slides-bundle.mk $(SOURCES)
+	tar czf $@ --transform 's,^,pandas-tutorial-slides/,' $(SOURCES)
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