Fixes for 0.2.2 to work on Unix

Hi there,

While running the test I found that subexec-0.2.2 is broken on Unix (all of them) when setting lang, this is a fix for that and also removes Gemfile.lock which is just going to cause issues when packaging or testing subexec.

HTH,
Diego
@gissues:{"order":60,"status":"backlog"}