New icons

[mseveritt]

Some more nordified icons that I find fitting for Nordzy

• brasero from tela (not the standad shape of the other app icons)
• dupeguru with white template and adapted icons from Papirus
• kdiff3 from Papirus (also not the standard shape of the other app icons)

What do you think?

[alvatip]

Thanks! I adapted brasero and kdiff3 using the background rectangle that is used for (nearly) all the applications icons to keep consistency among them, I did not modified dupeguru, just optimized the svg to take less place

[mseveritt]

I also had the feeling that brasero and kdiff3 might be better in the standard rectangle. Thanks for your nice alternative of brasero and the real nice adaptation of kdiff3 into that form. I will keep that form in mind for future proposals.