Merge branch 'refcounting' of github.com:dropbox/pyston into refcounting

test/tests/defaults_basic.py

-# expected: reffail
 d = {}
 print d.get(1)
 print d.setdefault(2)

test/tests/defaults_test.py

-# expected: reffail
 # Test for various defaults arguments in builtin functions:
 
 class ExpectationFailedException(Exception):

test/tests/kwargs_protocol.py

-# expected: reffail
 class C(object):
     def __len__(self):
         print "__len__"

test/tests/listcomp.py

-# expected: reffail
 print [(i, j) for i in range(4) for j in range(4)]
 
 def f():

test/tests/nbody_small.py

-# expected: reffail
 # -*- coding: utf-8 -*-
 # The Computer Language Benchmarks Game
 # http://shootout.alioth.debian.org/

test/tests/reload_test.py

-# expected: reffail
 import os, sys
 
 def delete_file(name):

test/tests/sys_test.py

-# expected: reffail
 import sys
 import os.path