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)
Please remove the `Thread`; we are currently overwhelmed with threading problems, let's not add some more before we 've figured out a way to prevent them from happening.