DOC: remove an obsolete file
DOC: add cython dependency to INSTALL
Merge pull request #2799 from andreas-h/INSTALL_cython

DOC: add cython dependency to INSTALL
DOC: make more clear when Cython is required.
BUG: stats: When handling the arguments to beta_gen.fit, don't rely on np.log
to generate a warning when its argument is less than or equal to 0.
Fixes gh-2771.
BUG: stats: Raise a ValueError in beta_gen.fit if all the parameters are fixed.
Merge pull request #2766 from argriffing/remove-obsolete-docs

DOC: remove doc/seps/technology-preview.rst
ENH: allow optional rescaling of input coordinates in ND interpolation
BUG: handle array_like input in stats.circ* functions.  Closes gh-2062.

Also add test for empty input, return nans.
Merge pull request #2802 from rgommers/issue-2062-circfuncs

BUG: handle array_like input in stats.circ* functions.  Closes gh-2062.
BLD: Fix msvc error C2036: 'void *' : unknown size

(cherry-picked from 827083acfa)
MAINT: remove lazy import stuff from lib.six.  Closes gh-2764.
Merge pull request #2801 from WarrenWeckesser/bug-beta-fit

BUG: stats: Fix a couple issues in the recently updated beta_gen.fit method.
TST: interpolate: fix for Python 3
BUG: interpolate/interpnd: rescale after translation
Merge pull request #2802 from andreas-h/ndinterpolator

ENH: allow optional rescaling of input coordinates in ND interpolation

Fixes gh-2191
Merge pull request #2803 from rgommers/issue-2764-sixmoves

MAINT: remove lazy import stuff from lib.six
BLD: special: fix build when system doesn't have isfinite macro