issue#34

[hlYassine]

return simply the subprocess return value

[coveralls]

Coverage remained the same at 69.707% when pulling 22033a7 on hlYassine:master into 375261b on p-e-w:master.

[BigAlInTheHouse]

extend your reading if you wish updated reviews.

[p-e-w]

In principle, that's exactly what we want. Unfortunately, it doesn't actually work (see #34).

I believe the culprit is the wrapper created by pip install. No matter what value is returned by main, it doesn't reach the shell.