rm icat/__pycache__ on make clean

Author: RKrahl

Makefile

@@ -18,7 +18,7 @@ doc-man: meta
 
 clean:
 	rm -rf build
-	rm -rf __pycache__
+	rm -rf __pycache__ icat/__pycache__
 	rm -rf tests/data/example_data.yaml
 	rm -rf tests/data/icatdump-* tests/data/ingest-*.xml
 	rm -rf tests/data/ingest-*.xsd tests/data/ingest.xslt