v0.7.6

Upload the photo you have; it becomes the banner.

- Avatars, banners and team logos are now scaled to fit instead of being refused. A phone photo or a 4K wallpaper is centre-cropped to the banner shape and scaled down; a large square becomes the avatar. Before, a banner was refused if it was taller than 1200px or over 5MB, and an avatar over 2MB — which is why no player on the site had managed to save a banner.
- Size caps: avatars and logos 10MB, banners 12MB.

Pull request: https://github.com/mtottenh/cg/pull/20