[PATCH] Documentation for Use Map feature of companion app

[Dirk Hohndel]

On Wed, 2014-05-07 at 17:50 +0530, Venkatesh Shukla wrote:
> Attached is a patch for adding documentation for subsurface-companion
> application.
> The Use Map feature for adding dive location is explained.
> 

I took Willem's patch instead. I'll push that out in a minute, please
send any additional changes to the manual relative to that.

Thanks

/D