+Mindstorm 0.5.4

On Thu, 13 Nov 2014 09:01:16 +0100, Christophe Troestler wrote:
> 
> On Wed, 12 Nov 2014 20:34:16 -0800, Peter Zotov wrote:
> >
> > There is no dependency on libusb-dev, though. Is the tag extraneous?
> 
> The USB is an optional dependency — with minimal testing (and only on
> Linux).  So the "lib:usb" added by oasis2opam is right, just not the
> recommended "connector".

I may eventually use ocaml-usb but not for this version.