[tor-dev] Testing in Tor

[Damian Johnson]

Hi Simon, I've made some fixes to hopefully avoid confusion about this
in the future (admittedly it was a really bad error message).

Better sanity checking for the tor command...
https://gitweb.torproject.org/stem.git/commitdiff/e22a753058a2b9c61301c62e2d2123ccea046f29

Reporting testing as having failed if tor can't start...
https://gitweb.torproject.org/stem.git/commitdiff/bf2f7f2a461b535ddd21728e29dc2091ef35a74d

Thanks for the catches! -Damian