PR: remove marble

[Dirk Hohndel]

> On Sep 2, 2017, at 4:49 AM, Lubomir I. Ivanov <neolit123 at gmail.com> wrote:
> 
> might be a good idea if multiple people take a look at this - e.g.
> debian packing scripts, android builds scripts, cmake etc.
> 
> https://github.com/Subsurface-divelog/subsurface/pull/557
> 
> if needed, i can try finding time to amend this PR on sunday late
> afternoon (EET).

Sorry for not responding earlier. After a week in Las Vegas I needed some
quiet time and didn't work on Subsurface over the weekend...

/D