this required switching to the generic gemm_beta code (which is faster anyway on SKX)
for both DGEMM and SGEMM

Performance for the not-retuned version is in the 30% range

This patch adds the basic infrastructure for adding the SkylakeX (Intel Skylake server)
target. The SkylakeX target will use the AVX512 (AVX512VL level) instruction set,
which brings 2 basic things:
1) 512 bit wide SIMD (2x width of AVX2)
2) 32 SIMD registers (2x the number on AVX2)

This initial patch only contains a trivial transofrmation of the Haswell SGEMM kernel
to AVX512VL; more will follow later but this patch aims to get the infrastructure
in place for this "later".

Full performance tuning has not been done yet; with more registers and wider SIMD
it's in theory possible to retune the kernels but even without that there's an
interesting enough performance increase (30-40% range) with just this change.

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