more robust checking for file existance add total "cpu" runtime to results XML file
more robust checking for file existance
add total "cpu" runtime to results XML file

tucano/bpipe,sb43/bpipe,vivovip/bpipe,vivovip/bpipe,vivovip/bpipe,tucano/bpipe,tucano/bpipe,sb43/bpipe,sb43/bpipe