Update minimum httplib2 dependency

Author: Jon Wayne Parrott

setup.py

@@ -63,7 +63,7 @@ def _DetectBadness():
 ]
 
 install_requires = [
-    'httplib2>=0.8,<1dev',
+    'httplib2>=0.9.2,<1dev',
     'oauth2client>=1.5.0,<5.0.0dev',
     'six>=1.6.1,<2dev',
     'uritemplate>=3.0.0,<4dev',