AppData improvements

[jurf]

Some improvements to the AppData:

• Use reverse-DNS ID
• Run through appstream-util upgrade
• Add translation info
• Improve summary/description
• Add release info
• Add OARS
• Add kudos
• Update donation URL
• Reorder

It would be great if you could update the release info on when pushing a new version.

[kozec]

That name is typo that I never noticed, but I'm sure changing it now would break something.

What I'm more curious about is why are you removing code for copying appdata.xml from script that generates appimage?

[jurf]

@kozec: I just moved it to the regular install instructions.

[jurf]

Thanks!