OpenBLAS

Fixed #395. Enable optimized cgemm for Sandybridge. Added optimized sdot kernel.
Fixed c/zgemm, zgemv computational error of haswell, piledriver, bullldozer, and
barcelona on Windows.

Merge branch 'develop' of https://github.com/wernsaar/OpenBLAS into wernsaar-develop

Conflicts:
	kernel/Makefile.L1
	kernel/x86_64/KERNEL
	param.h