communicate when files are downloaded

corrlib/meas_io.py

@@ -168,8 +168,11 @@ def cache_path(path, file, key):
 
 
 def preload(path: str, file: str):
+    print("Loading data...")
     dl.get(os.path.join(path, file), dataset=path)
+    print("> downloaded file")
     filedict = pj.load_json_dict(os.path.join(path, file))
+    print("> read file")
     return filedict