Mention transport argsort for inverting the transposition
MAINT: change place where NPY_NO_DEPRECATED_API is defined in f2py.

This makes sure to undef at the end, and by putting the define in the
C code it ensures that the error message is understandable.
DOC: fix documentation build removing single backticks

using them around setup.py build causes a "error: option -b not
recognized" error from sphinx-build.
Replace them with * for italic.
DOC: sync 1.9.1 release notes

[ci skip]
Merge pull request #5284 from juliantaylor/doc-fix

DOC: fix documentation build removing single backticks
Merge pull request #5264 from nils-werner/untranspose

Untranspose method
Merge pull request #5281 from rgommers/f2py-deprecated-api

MAINT: change place where NPY_NO_DEPRECATED_API is defined in f2py.
ENH: add BagObj.__dir__ to numpy.lib.npyio

This allows dir(bagobj), and also enables tab-completion on a BagObj,
which can be useful in an interpreter or IPython
TEST: added test of BagObj