add binder

README.md

@@ -32,3 +32,5 @@ the number of entries in one specific set.
 ## [Harvest ABO Marc](harvest_abo_marc.py)
 
 Small script to harvest ABO metadata in Marc format via OAI-PMH.
+
+[![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/git/https%3A%2F%2Flabs.onb.ac.at%2Fgitlab%2Flabs-team%2FLOD/master)
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