DOC: Correcting docstring for asscalar
TST: rename one test_hypergeometric_range function

There are two test functions named `test_hypergeometric_range`
Merge pull request #3372 from juliantaylor/datetime-leak

BUG: fix leak and possible use after free
TST: remove docstring from test_randint_range function

See doc/TESTS.rst.txt for the reason.
Merge pull request #3374 from cgohlke/patch-4

TST: rename 2nd test_hypergeometric_range function
Merge pull request #3366 from dnmiller/doc-fix

DOC: Correcting docstring for asscalar
BUG: Fix multivariate_normal issue with 'size' argument

Ensure that the multivariate_normal size argument can be a numpy integer. Add regression test. Apply PEP8 to test_regression.py. Regenerate mtrand.c.
TST: remove docstrings from test_ functions

See doc/TESTS.rst.txt for the reason.
Merge pull request #3373 from cgohlke/multivariate_normal-fix

multivariate_normal issue with 'size' argument
ENH: implement may_share_memory in C

memmap needs to call it in __array_finalize__ to determine if it can
drop the references on copies.
The python version if may_share_memory caused significant slowdowns when
slicing these maps.

closes gh-3364
ENH: improve performance of byte_bounds for continous arrays
MAINT: remove duplicated array extent calculation