Merge pull request #41 from gijsbers/master

merge the Front runtime system
Merge pull request #42 from gijsbers/master

Performance Test Suite for S-Net.
Merge pull request #43 from gijsbers/master

add Cholesky to testperf.sh. fixes in Perf Test Suite for old Linux machine.
add ifdef macro to avoid warnings when not use logging mode
Merge pull request #44 from nguyenvuthiennga/master

Add macro to avoid warning while not using logging mode