If you want to build LAPACK deprecated functions since LAPACK 3.6.0

make BUILD_LAPACK_DEPRECATED=1

Bug727

* Bench small matrices with multi-threading
* Close #727

* Use stack allocation
* Disable multi-threading
* Ref #727

For better performance with small matrices
Ref #727

re enable Fortran optimization flag on windows

Second part of "support Intel Avoton via Nehalem kernel"

Add recognition of Intel Atom C27xx (Avoton, model code 4D)

partial revert of 299cdcdc29
from #696, was not explained why that was needed

Update Makefile.system to fix awk/nawk issue #763

Define AWK as "nawk" for SunOS (actually Illumos) only - fixes #763

Let openblas_get_num_threads return the number of active threads

Bug742

illumos fixes

... not the number of allocated threads.

Close #760

Ref #740: all assembly codes now clear floating point register correctly

the illumos linker can't understand the "-Y/lib"... form that f_check
generates, and -Wl cannot pass options that include commas

...not a matrix size. For GEMM_MULTITHREAD_THRESHOLD=4
(the default value) this does not change anything but
for other values it make the GEMM and GEMV thresholds
changing in the same way.

Close #742