[PATCH] BTT patch: (3/3) time bounded trace analysis

[PATCH] BTT patch: (3/3) time bounded trace analysis

Added in -t and -T options to allow bounding of traces analyzed. Be
forewarned: this can result in some excessive numbers of orphaned traces
(partial IO streams before the -t tiem and after the -T time won't
be analyzed).

Signed-off-by: Alan D. Brunelle <Alan.Brunelle@hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>