ENH: allow sparse __rmul__ to work with custom types
DOC: enhanced fftpack tutorial
DOC: further changes in fftpack tutorial
enhanced one example
Fixed issue #2720 in tutorial
adressed review comments, used [] throughout the document
ENH integrate: quadrature accepts non-tuple args argument

Copy quad behavior accepting a single element (integer) instead of the
expected tuple

Closes gh-2044
BUG: fix the 'lower' attribute of dpotri to make dpotrf/dpotri consistent.
Should close gh-2691

Also remove (deprecated) clapack dpotri/dpotrf functions.
Fix issues/2331: Bode plot returns continuous phase
BUG: issues/2331, change to assert_almost_equal and style improvement
ensure analyticity of associate Legendre function of first kind
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.
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.
removed superfluous comments
adapted documentation