Openbazaar python launcher

new pull request after 1st round of reviews.
Thanks @Renelvon this has the merged changes from your repo.

(@Renelvon I kept that REVERT commit you put there as I'm not sure I understood what was right or wrong about it, I figured it'd be easier to fix here now)
Yes. I'm not sure if the mutex will work to resolve it. Perhaps @Renelvon or @dionyziz have thoughts on how best to resolve this one.