MAINT: remove some duplication in vectorized compare code
Merge pull request #4437 from abalkin/issue-4436

BUG: Masked array filled method ignores fill value
ENH: vectorize isnan

isnan on amd64 is equivalent to x != x so we can use the existing code
with only adding a specialization for unary loops.
Merge pull request #4448 from sviterok/fix_broadcasting_doc

DOC: Update link to EricsBroadcastingDoc
Merge pull request #4447 from charris/small-optimization

MAINT: Use static variable in numpy/core/src/multiarray/descriptor.c.
Merge pull request #4449 from juliantaylor/vectorize-isnan

ENH: vectorize isnan
Merge pull request #4421 from meltingwax/meltingwax/4382

BUG: Fix support for builds with directories that contain whitespace
Merge pull request #4418 from charris/remove-cython-pyrex-directories

MAINT: Remove doc/cython and doc/pyrex files.
BUG: restore api for file npy_PyFile_Dup and npy_PyFile_DupClose

breaking the api breaks matplotlib build and pip installation.
Introduce npy_PyFile_Dup2 and npy_PyFile_DupClose2 as replacements
Merge pull request #4334 from jspreston/patch-1

numpy.i bugfix: fortran ordering check
Merge pull request #4450 from juliantaylor/api-restore

BUG: restore api for file npy_PyFile_Dup and npy_PyFile_DupClose
Revert "Merge pull request #4421 from meltingwax/meltingwax/4382"

Caused SciPy tests to fail when built with this NumPy.
Merge pull request #4451 from meltingwax/meltingwax/revert-4421

BUG: Revert PR #4421: causes SciPy tests to fail
ENH: Added an output argument for numpy.outer
TST: work around outdated travis boxes

run manual apt-get update to pick up the latest py3 security update
DOC: Fixed documentation on lstsq function on when it return an empty residuals array
Merge pull request #4457 from cimarronm/linalg_lstsq_docfix

DOC: Fixed documentation on lstsq function on when it return an empty re...
Merge pull request #4456 from juliantaylor/travis-updates

work around outdated travis boxes
Added versiontag to docstring
Merge pull request #4459 from Sankarshan-Mudkavi/fix-gh-1367

ENH: Added an output argument for numpy.outer