Added ability to pass manual GEMM_OPT flags during make.
Remover __PHIGEMM_SELFTUNE and __PHIGEMM_CPUONLY. Clean-up still
ongoing...
Uniform header across all files
Auto-tuner. It is just the beginning...
call-by-call profiler for CPU-only codes. It is just the beginning...
One single SPLIT value is enough.