BUG: cythonize sources for wheel build

Wheel build was not cythonizing sources, giving a compile error because
needed `numpy/random/mtrand/mtrand.c` was missing.
TST: add travis test for wheel build and install

Add travis build that builds and installs wheel, runs tests from
installed wheel.
removing call to asanyarray
Merge pull request #4684 from perimosocordiae/patch-1

BUG: argwhere is not equivalent to transpose(nonzero(...)))
BUG: mtrand binomial algorithm is different from original paper algorithm
TST: update package list for chroot build

travis boxes are again badly out of date
Merge pull request #4691 from juliantaylor/travis-fix

TST: update package list for chroot build
Updated release notes to warn users about RNG state changes
Merge pull request #4687 from wa03/randBinomFix

BUG: mtrand binomial algorithm is different from original paper algorithm
Merge pull request #4662 from matthew-brett/cythonize-for-wheels

BUG: cythonize sources for wheel build
BUG: Fix invalid value raised as error when testing on Windows.

The invalid value RuntimeWarning is raised as an error in numpy
testing, and in this case the Window build was raising the warning
for comparisons of NaNs.

Fixes the first error in #4698.
Merge pull request #4700 from charris/ignore-invalid-value-in-test

BUG: Fix invalid value raised as error when testing on Windows.