Remove useless sleep() calls that were slowing down Python scipy build
clarify comment
run proper unit test for run_cmd_qa
add longer run_cmd test
Merge pull request #5 from boegel/remove-useless-sleep

add/enhance unit tests, adjust comment
Merge pull request #599 from gribozavr/remove-useless-sleep

Remove useless (or undocumented) sleep() calls that were slowing down Python scipy build