numpy.i bugfix: fortran ordering check

for ARGOUTVIEWM?_FARRAY[34] typemaps, the included require_fortran check was inverted -- failing if the resulting array had fortran ordering, not if it did not.  This modification inverts these checks.
MAINT: Remove doc/cython and doc/pyrex files.

Pyrex is obsolete and cython does a good job with Numpy these days.
These directories are not packages, so I don't think they need
deprecation.

Closes #4373.
DOC: Document removal of doc/pyrex and doc/cython directories.
BUG: Fix support for builds in dirs with whitespace

Add escaping and quoting of dirs and enabled POSIX support in lexer.

Closes #4382.
MAINT: Use static variable in numpy/core/src/multiarray/descriptor.c.

This produces slightly cleaner code. When the const string array is not
static, gcc puts it on the stack and initializes it on every entry.
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.
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TST: work around outdated travis boxes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work around outdated travis boxes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