Fix tests for Python 2.5

github/tests/Framework.py

@@ -18,14 +18,19 @@ import sys
 import unittest
 import httplib
 import traceback
-import json
 import urlparse
 
 import github
 
+atLeastPython26 = sys.hexversion >= 0x02060000
 atLeastPython3 = sys.hexversion >= 0x03000000
 atMostPython32 = sys.hexversion < 0x03030000
 
+if atLeastPython26:
+    import json
+else:  # pragma no cover
+    import simplejson as json  # pragma no cover
+
 
 def readLine(file):
     if atLeastPython3: