ENH: use dot (BLAS!) in linalg.norm
MAINT: dotblas: factor out all gemm and gemv calls
Allow checking two or more fortran compilers instead of one.
DOC: add 1.7.2 release notes
Merge pull request #3997 from juliantaylor/release-notes

DOC: add 1.7.2 release notes
MAINT: Don't use 'import *' in lib/test_twodim_base.py.
ENH: lib: Rewrite vander: make it faster, and add an option to specify the order of the powers (either decreasing or increasing).
MAINT: lib: remove unused imports and PEP8 clean up in twodim_base.py
MAINT: lib: Add a 'See Also' section to the vander docstring, and make a few more PEP8 tweaks.
MAINT: lib: Use a consistent PEP8-compliant import style in twodim_base.py and tests/test_twodim_base.py.  Also make a couple more PEP8 tweaks.
Merge pull request #3999 from WarrenWeckesser/vander

ENH: lib: Rewrite vander
DOC: update 1.7.2 release notes

add two additional fixed bugs
Merge pull request #4003 from juliantaylor/release-notes

DOC: update 1.7.2 release notes
DOC: fix layout of issue listings in release notes
Merge pull request #4004 from juliantaylor/doc-updates

DOC: fix layout of issue listings in release notes
ENH: replace Py_BuildValue with faster PyTuple_Pack
ENH: replace PyUFunc_GetPyValues with faster _get_bufsize_errmask

avoids unnecessary creation of unused error objects.
MAINT: remove unused variable
ENH: early return from PyArray_EquivTypenums if the numbers are equal
Merge pull request #4010 from juliantaylor/reduce-opt

reduction micro optimizations