refine command line options of log_analyzer
make client local queue shorter (3->2) for load balancing (unblocking buffered channel -> blocking channel)
some minor updates
re-organize awe-client code: group functions by worker types
awe-client adds dedicated data movers (in and out) working in pipeline fashion with workStealer and worker
deliverer uses absolute filepath when pushing output file to shock
support performace statistics collection for job/task/workunit
performance reports go to perf.log at server side
make it configurable whether overlapping data move with computation at client side
make it configurable whether to include workunit perf reports in perf.log (since they're big)
Merge pull request #20 from wtangiit/master

client enhancement (data movers and performance statistics)