@glennblock agree on `Path.Combine()`. I'll change it to use that.

I tried running the Bau acceptance tests last night and the stdout capture just didn't seem to work. Having said that I didn't investigate it deeply. My next challenge was to get some kind of debugging environment together on Linux, but the Ubuntu monodevelop distro is hopelessly outdated (see http://monodevelop.com/Download). It looks like apt-get has a later version but it's still some way behind the latest stable build, so I decided to build and run from source. That got me into another rabbit hole of missing dependencies etc. but this morning I finally manage to build it. Didn't have time to run it though :stuck_out_tongue_winking_eye:

Anyway, enough rambling. I'll change it to use `Path.Combine()` and I'll also change the process invocation to `mono scriptcs.exe` under Mono. I'll try and execute the tests in Linux if possible but if things explode I still think we should press ahead here and deal with it in #715.