clang 3.4 managed to accept the original test code, only to fail on the actual Skylake asm later

Restore _Atomic define before stdatomic.h for old gcc

see #1593

Check build system support for AVX512 instructions

Fix inverted condition in _Atomic declaration

fixes #1593

Disable AVX512 (Skylake X) support if the build system is too old

Revert "take out unused variables"

This reverts commit e5752ff9b3.

The variables i and n are used in the `#if !__GLIBC_PREREQ(2, 7)`
branch.

Closes gh-1586.

Fixes from Lapack-Reference PR 253

When minimal workspace is given in ?hesv_aa, ?sysv_aa, ?hesv_aa_2stage, ?sysv_aa_2stage, now no error is given
Quick return for ?laqr1

LAPACKE interfaces for Aasen's functions now call ?sytrf_aa and ?hetrf_aa instead of ?sytrf and ?hetrf

Work around name clash with Windows10's winnt.h

Handle INCX=0,INCY=0 case

Update version number on the develop branch to 0.3.1.dev

Fix paths to LIN and EIG tests

fixes #1503

Fixes #1575 (sswap/dswap failing the swap utest on x86) as suggested by atsampson.

should fix 1574

Adapt lapack-test and blas-test to changes in netlib directory layout

partial fix for #1574 - the problem with lapack_testing.py looks like an upstream bug

Conflicts:
	exports/Makefile

Use the new zrot.c on POWER8 for crot as well

fixes #1571 (the old zrot.S assembly does not handle incx=0 correctly)

Revert " Switch mips32 target to USE_TRMM to fix complex TRMM"

... as it was just a silly workaround for the issue seen in #1563, caused by #1419

Remove extraneous brace from previous commit of mips dsdot fix

Revert changes from PR#1419

at least one of these changes apparently is an oversimplification, leading to TRMM breakage on some platforms as observed in #1563

Use correct data type for initializers of v2f64, v4f32

Fixes #1561

Add build-time configuration options to pkgconfig file

Overwrite any pre-existing openblas.pc rather than append to it

Add threading and OpenMP information to output

For #1416 and #1529, more information about the options OpenBLAS was built with is needed. Additionally we may want to add this data to the openblas.pc file (but not all projects use pkgconfig, and as far as I am aware the cmake module for accessing it does not make such "private" declarations available)

move _Atomic define to common.h