Late UI change in gnome-weather

Dear release-team and doc team,

I just wanted to inform you that I plan to push the changes at 
https://bugzilla.gnome.org/show_bug.cgi?id=703150 to gnome-weather for 
3.18.

What the changes do is to replace all the backgrounds used by 
gnome-weather with new ones, that have a better (more permissive) 
license and have better readability for the overlaid text.
The change was originally requested by Debian, as they cannot package 
gnome-weather in the current form because some of the current 
backgrounds are not DFSG-compliant.

As such, there should be no user impact, other than old screenshots and 
documentation materials will need to be updated. Screenshots used in 
AppStream are part of the git repository and I will update them. I 
don't recall any other documentation for gnome-weather, and I don't 
foresee it being featured in the release notes.
Therefore I don't think there is any risk from this change, but 
comments are welcome. If there is no objection, the changes will appear 
in 3.17.92 next week.

Thanks,

Giovanni