Add support for using openblas for the _dotblas function.
BLD: Update with information about openblas.
BUG: Set __hash__ = None for non-hashable classes.

Because neither poly1d nor the Polynomial package polynomial classes are
immutable, hence not reliably hashable, they should signal that by
setting __hash__ = None. This also fixes the warning

Overriding __eq__ blocks inheritance of __hash__ in 3.x

that is given when the command `python2.7 -3 -c"import numpy"` is run.
ENH: Avoiding conversion of integer to NumPy Scalar.
There is a bottleneck in scalar operations, when trying to extract the
underlying C value from a Python integer/float. I have avoid conversion
for know integer type but extracting its value.
Extracting longlong value without converting it to NyType
Moved int test cases to pr#3592
Added PyInt_CheckExact for python < 3 and error check for PyLong_AsLong
Replaced PyInt_As_Long with PyInt_AsLong and  errorchecking
ENH: add nonzero of bools fastpath

count_nonzero already has a fastpath but nonzero does not.
Improves performance by about 25% via avoiding a function call.
Merge pull request #3644 from juliantaylor/nonzero-bool

ENH: add nonzero of bools fastpath
Check for error value by PyLong_AsUnsignedLong as (unsigned long)-1
DOC: Add NEP and documentation for ufunc overrides.
ENH: Add ufunc override API.
BUG: Make DeprecationWarning always raise error in test.

The test_fancy in numpy/lib/tests/test_function_base.py failed in
release because a DeprecationWarning was no longer raised, it had
become a warning.
BUG: Catch DeprecationWarning in numpy/core/tests/test_numeric.py.

TestCreationFuncs.check_function was spewing Deprecation warnings in
release mode. AFAICT, it did not raise errors during development because
it was buried by a TypeError. The Deprecation in question is at line
1141 in multiarray/conversion_utils.c. Hiding the deprecation should
be harmless here, but when the Deprecation is turned into an error
it will need to be caught in the test.
MAINT: Make Warning handling cleaner in test_concatenate_sloppy0.

The test in question is in numpy/core/tests/test_shape_base. The cleanup
consists of using warning.catch_warnings instead of setting and popping the
warnings filter.
Merge pull request #3668 from charris/fix-buggy-tests

Fix buggy tests
MAINT: Update pavement.py script.

Remove builds for Python 2.6 and 3.1
Update release notes path to doc/release/1.9.0-notes.rst.
Set LOG_START to 'branch-1.8.x'
Merge pull request #3567 from arinkverma/avoid_conversion

ENH: Avoiding conversion of integer to NumPy Scalar.
Merge pull request #3672 from charris/update-pavement

MAINT: Update pavement.py script.