Merge tag 'v1.81' into develop

fixed zip file processing

rowers/dataprep.py

@@ -29,6 +29,7 @@ from rowingdata import (
 from rowers.models import Team
 
 import os
+import zipfile
 import pandas as pd
 import numpy as np
 import itertools

rowers/tests.py

@@ -1146,6 +1146,7 @@ class ViewTest(TestCase):
 	f_to_be_deleted = w.csvfilename
 	os.remove(f_to_be_deleted+'.gz')
 
+        
 #    def test_upload_view_FIT_SpeedCoach2a(self):
 #	self.c.login(username='john',password='koeinsloot')