I think it's most important that we do this for the first arg,
since CPython won't end up increffing it either.

Looked at all places it comes from and this looks safe
(it's alive at least as long as the other arguments).

We are now crashing on cpython_oldstyle_getattr_crash (a CPython crasher)
but that's not really the fault of this change.

Merge refcounting into master

tuple: implement tp_as_sequence->sq_contains

Some cleanup for the refcounting merge

enable sqlalchemy_smalltest

I did not trigger this bug (also could not come up with a test) but just by inspecting the code I thought it's very suspicious.

But I did remove the assert(!exc_state.is_reraise) assert because it got hit in a legitimate case,
(c++ exception got rethrowen in the llvm tier, cought in our c++ code and rethrowen because of api mismatch. With no python code in between.)

Reenable the 'extra' tests

I don't know what the reason is, but it's tripping up cffi's test suite.

Extract the logic from DEFAULT_CLASS_SIMPLE

One small change for numpy performance

merge the missing merge commits (mostly cosmetic change)

so that it can be used in more places.  Looking at pyxl_bench2_10x,
most of the calls to PyType_GenericAlloc are from the dict and list
iterator classes, which don't use DEFAULT_CLASS_SIMPLE (or DEFAULT_CLASS)
since they use the same C++ class with multiple Python classes.  So
by extracting out the core of that function, it's now usable by those
other classes.

Also convert some things to DEFAULT_CLASS_SIMPLE while we're at it.

- support CPython
- don't blow away the checkout each time

Numpy was hitting this a lot

I love optimizing things we haven't approached before.  This small change
improved numpy.test() performance by 20%.

some minor NumPy fixing

Fix remaining "check refcounting" assertions

Conflicts:
	src/codegen/compvars.cpp

Remove numpy submodule

clone numpy with 1.11.0 tag from github,
and adjust the numpy test file.

Some misc performance optimizations