Tweak python version support, add wait to int test

Author: jhodges10

setup.py

@@ -25,7 +25,7 @@ def run(self):
 setuptools.setup(
   name='frameioclient',
   version=version,
-  python_requires='>=2.6',
+  python_requires='>=2.6, <4',
   install_requires=[
     'requests',
     'urllib3',

tests/integration.py

@@ -3,6 +3,7 @@
 import json
 import mimetypes
 import platform
+import time
 
 from frameioclient import FrameioClient
 
@@ -83,6 +84,11 @@ def test_upload(client):
 
         print("Done uploading file {} of {}".format((count+1), len(dled_files)))
 
+        print("Sleeping for 5 seconds to allow uploads to finish...")
+        time.sleep(5)
+
+        print("Continuing...")
+        
     return new_parent_id
 
 # Flatten asset children and pull out important info for comparison