bug fix: releasing permit channel if input file preparation fails
Merge pull request #155 from wtangiit/master

bug fix: releasing permit channel if input file preparation fails
save job perf stats in mongodb (in addition to perf.log) and provide API to return json struct
remove a field in no need in taskperf
Merge pull request #156 from wtangiit/master

save job perf stats in mongodb and provide API to retrieve json struct
typo fix
make GOMAXPROCS configurable
Merge pull request #157 from wtangiit/master

make GOMAXPROCS configurable
added xls output for job stats