First draft of "Open-source software for science"

As discussed through e-mail with @shaunagm, here's the piece on open-source scientific software. This is a translation of a Dutch article that I wrote for *De Psychonoom*, the magazine of the Dutch psychonomic society. Most of it is a straightforward translation, although I modified the semi-final paragraph a bit, because it was initially written for an audience unfamiliar with the COS.

Let me know if you're interested and whether you have any suggestions!

Cheers,
Sebastiaan