Merge branch 'softwareweek2019' of gitlab.ub.uni-bielefeld.de:scs/ipaaca into softwareweek2019

conda.recipe/meta.yaml

@@ -26,13 +26,13 @@ outputs:
     script: install_cpp.sh
     requirements:
       host:
-        - libprotobuf
+        - protobuf
         - mosquitto
         - libboost
 
       run:
         - mosquitto
-        - libprotobuf
+        - {{ pin_compatible(libprotobuf) }}
         - libboost
   - name: ipaaca-py
     noarch: python