proper requests authentication

github3/models.py

@@ -59,6 +59,7 @@ class BaseResource(object):
             _gh = gh
         )
 
+
     def update(self):
         deploy = key_diff(self._cache, self.dict(), pack=True)
 
@@ -69,12 +70,6 @@ class BaseResource(object):
         return r
 
 
-
-    def setattr(self, k, v):
-        # TODO: when writable key changed,
-        pass
-
-
 class Plan(BaseResource):
     """Github Plan object model."""