ENH: Add ext parameter to UnivariateSpline call

Pass parameter to fitpack.splev to control how to handle out of range
evaluations. Added test to scipy/interpolate/tests/test_fitpack2.py.

See ticket 3557.

closes gh-3557
STY avoid unnecessary transposes in csr_matrix.getcol/row
ENH: Add ext parameter to UnivariateSpline

Pass parameter to fitpack.splev to control how to handle out of range
evaluations. Parameter ext can be passed via __init__ or __call__. Added
test to scipy/interpolate/tests/test_fitpack2.py. Tests if UnivariateSpline
call equals x ** 3 for out of range x and extrapolation modes 0 and 1.

See ticket 3557.

closes gh-3557
ENH: Add ext parameter to UnivariateSpline

Pass parameter to fitpack.splev to control how to handle out of range
evaluations. Parameter ext can be passed via __init__ or __call__. Added
test to scipy/interpolate/tests/test_fitpack2.py. Tests if UnivariateSpline
call equals x ** 3 for out of range x and extrapolation modes 0 and 1.
Modify _from_tck, derivative, and antiderivative methods to use ext
parameter. __init__ of LSQUnivariateSpline and InterpolatedUnivariateSpline
now accept ext.

See ticket 3557.

closes gh-3557
ENH: orthogonal procrustes solver
MAINT: replace asarray with more specific format request
MAINT: tweak import
TST: more extensive procrustes testing
MAINT: fiddle with procrustes arrays
MAINT: add an optional return value to orthogonal procrustes and add a few more tests
MAINT: avoid spurious warnings in binom(n, p=0).mean() etc

closes gh-3817
DOC: typo
BUG: Fix tests that expect numpy 1.9 to implement __numpy_ufunc__.

Change Numpy version tests to check for 1.10 instead.
DEP: Disable sparse inplace DeprecationWarnings for Numpy < 1.10.

I'm not sure that this is __numpy_ufunc__ dependent, but I suspect
so.
DOC: sparse: add the function 'find' to the module-level docstring
BUG: Removed unnecessary storage of args as instance variables in Rbf
MAINT: update pip wheelhouse for installs

Astropy wheelhouse no longer being used by astropy; switch to Rackspace
container.
ENH: cluster: rewrite and optimize hierarchy in Cython
Merge pull request #3860 from WarrenWeckesser/add-find-to-mod-doc

DOC: sparse: add the function 'find' to the module-level docstring
Merge pull request #3866 from matthew-brett/update-wheelhouse

MAINT: update pip wheelhouse for installs