MAINT: forward port changes from 0.14.x - release notes and scripts.
DOC: Added 0.15.0 release notes entry for linprog function.
Fix documentation for cKDTree.sparse_distance_matrix
Merge pull request #3622 from robfalck/linprog_release_notes

DOC: Added 0.15.0 release notes entry for linprog function.
DOC: stats: remove duplicated names from the mstats module docstring
MAINT: stats: A bit of docstring and whitespace clean up.
MAINT: signal: remove a useless function from wavelets.py
Merge pull request #3628 from WarrenWeckesser/remove-wavedec

MAINT: signal: remove a useless function from wavelets.py
BUG: sparse/superlu: fix || vs && mistake in L/U attributes + add test
Merge pull request #3627 from WarrenWeckesser/stats-doc

MAINT: stats: A bit of clean up
Merge pull request #3625 from thouis/patch-1

Fix documentation for cKDTree.sparse_distance_matrix
Merge pull request #3635 from pv/splu-lu-bug

BUG: sparse/superlu: fix || vs && mistake in L/U attributes + add test
TST: fix a number of test errors for ``test('full')`` with numpy master.
TST: ignore deprecation warnings for optimize.anneal
Merge branch 'pr/3616' into master.

Review at https://github.com/scipy/scipy/pull/3616