replaced async with non keyword equivalent

rowers/c2stuff.py

@@ -859,7 +859,7 @@ def default(o):
     raise TypeError
 
 # Uploading workout
-def workout_c2_upload(user,w,async=False):
+def workout_c2_upload(user,w,asynchron=False):
     message = 'trying C2 upload'
     try:
         if mytypes.c2mapping[w.workouttype] is None:
@@ -888,7 +888,7 @@ def workout_c2_upload(user,w,async=False):
                    'Content-Type': 'application/json'}
         import urllib
         url = "https://log.concept2.com/api/users/%s/results" % (c2userid)
-        if not async:
+        if not asynchron:
             response = requests.post(url,headers=headers,data=json.dumps(data,default=default))