made mongo2toku print human-friendly times, fixes #839
added logic to skip nop/create ops but register them as processed, fixes #838
added auth support on remote hosts with mongo2toku, fixes #836
fixed some destructor ordering in mongo2toku, fixes #837
fixed initThread crash in mongo2toku, fixes #834
cleaned up mongo2toku's query
added NEWS for #834, #836, #837, #838, and #839