i #222 make sure to free feature list in convert module
i #222 make sure to free feature list in convert module

HPI-SWA-Lab/BP2016H1,HPI-SWA-Lab/BP2016H1,HPI-SWA-Lab/BP2016H1,HPI-SWA-Lab/BP2016H1,HPI-SWA-Lab/BP2016H1