add simple benchmark tool
benchmark client uses command line arguments
move total-time tracking code to state
ignore unset claim_urls
extract targets functionality to transition base
set base_rate in TransitionBase init
report times per request type
add multiprocessing support
Merge pull request #25 from mark-burnett/master

waiting claims have no active duration
separate stats collection from state
improve reporting
use requests.Session for HTTP Keep-Alive
first try GET when activating
Merge pull request #24 from mark-burnett/bench

Add a stochastic benchmark tool
add missing stats file
Merge pull request #26 from mark-burnett/bench

add missing stats file