WIP: avoid densifying on sparse elementwise mult
ENH: specific warning if matlab file is empty

Give a more specific and informative error when the matlab file is
empty.  Closes gh-4081
ENH: linalg: Add a function to compute the inverse of a Pascal matrix.
DOC: linalg: Add invpascal to the linalg package docstring and 0.16.0 release notes.
MAINT: linalg: Whitespace alignment.
MAINT remove unnecessary NULL check before free()

See 8708ad91fffd972313f4bf97a93869e57b058767 for rationale.
MAINT const for strings in TNC

This is just cleanup, not a semantic change.
MAINT: ndimage: malloc casts, NULL checks before free

See 8708ad91fffd972313f4bf97a93869e57b058767 for rationale.
MAINT: io: Give an informative error when attempting to read a 24 bit wav file.

Also add a note to the docstring of wavfile.read that 24 bit files are not
supported.
MAINT: io: PEP8 clean up in wavfile.py
TST: lib, linalg: fix blas tests with intent(in,out) arguments

f2py intent(in,out) does not guarantee in-place operations.
Merge pull request #4267 from pv/tstf2pyinout

TST: lib, linalg: fix blas tests with intent(in,out) arguments
Merge pull request #4266 from WarrenWeckesser/wav-24bit-error

 MAINT: io: Give an informative error when attempting to read a 24 bit wav file.
MAINT: fftpack benchmark integer division vs true division
MAINT: avoid shadowing the eigvals function
Merge pull request #4268 from argriffing/fftpack-benchmark-division

MAINT: fftpack benchmark integer division vs true division
BUG: sparse: Fix bench_sparse.py

In a previous change to bench_sparse.py, the imports of dok_matrix and
lil_matrix were removed, because pyflakes reported them as unused.
In fact, these were needed for a benchmark that was creating instances of
these matrices using eval().

In this commit, instead of constructing the names as a string and then
eval'ing the string, the class names are used explicitly.
Merge pull request #4272 from WarrenWeckesser/bug-bench-sparse

BUG: sparse: Fix bench_sparse.py
Merge pull request #4269 from argriffing/test-decomp-pyflakes

MAINT: avoid shadowing the eigvals function
MAINT: fix up paver script, correct paths on windows, py 3.4, sha256 checksums