Another optipng run over png's.
Ran optipng -o7 -fix over all png files. This should make pages load a tiny bit faster (you can test this with the pagespeed tool on firefox or chrome). It might be an idea to add *lossless* image compression optimization runs to the release process.
Showing
![app/assets/images/logo-black.png](https://lab.nexedi.com/iv/gitlab-ce/-/raw/284546b2e00639bfa5e965f6a846cf308752d58e/app/assets/images/logo-black.png)
![app/assets/images/logo-white.png](https://lab.nexedi.com/iv/gitlab-ce/-/raw/284546b2e00639bfa5e965f6a846cf308752d58e/app/assets/images/logo-white.png)
![public/gitlab_logo.png](https://lab.nexedi.com/iv/gitlab-ce/-/raw/284546b2e00639bfa5e965f6a846cf308752d58e/public/gitlab_logo.png)
![vendor/assets/images/authbuttons/github_32.png](https://lab.nexedi.com/iv/gitlab-ce/-/raw/284546b2e00639bfa5e965f6a846cf308752d58e/vendor/assets/images/authbuttons/github_32.png)
![vendor/assets/images/authbuttons/github_64.png](https://lab.nexedi.com/iv/gitlab-ce/-/raw/284546b2e00639bfa5e965f6a846cf308752d58e/vendor/assets/images/authbuttons/github_64.png)
![vendor/assets/images/authbuttons/google_32.png](https://lab.nexedi.com/iv/gitlab-ce/-/raw/284546b2e00639bfa5e965f6a846cf308752d58e/vendor/assets/images/authbuttons/google_32.png)
![vendor/assets/images/authbuttons/google_64.png](https://lab.nexedi.com/iv/gitlab-ce/-/raw/284546b2e00639bfa5e965f6a846cf308752d58e/vendor/assets/images/authbuttons/google_64.png)
![vendor/assets/images/authbuttons/twitter_32.png](https://lab.nexedi.com/iv/gitlab-ce/-/raw/284546b2e00639bfa5e965f6a846cf308752d58e/vendor/assets/images/authbuttons/twitter_32.png)
![vendor/assets/images/authbuttons/twitter_64.png](https://lab.nexedi.com/iv/gitlab-ce/-/raw/284546b2e00639bfa5e965f6a846cf308752d58e/vendor/assets/images/authbuttons/twitter_64.png)
![vendor/assets/images/bg_fallback.png](https://lab.nexedi.com/iv/gitlab-ce/-/raw/284546b2e00639bfa5e965f6a846cf308752d58e/vendor/assets/images/bg_fallback.png)
![vendor/assets/images/icon_sprite.png](https://lab.nexedi.com/iv/gitlab-ce/-/raw/284546b2e00639bfa5e965f6a846cf308752d58e/vendor/assets/images/icon_sprite.png)
![vendor/assets/images/slider_handles.png](https://lab.nexedi.com/iv/gitlab-ce/-/raw/284546b2e00639bfa5e965f6a846cf308752d58e/vendor/assets/images/slider_handles.png)
![vendor/assets/images/ui-icons_222222_256x240.png](https://lab.nexedi.com/iv/gitlab-ce/-/raw/284546b2e00639bfa5e965f6a846cf308752d58e/vendor/assets/images/ui-icons_222222_256x240.png)