Implements new Calamares branding:
- New side panel
- Completely new animated slideshow based on @bogdancovaciu mockups
- New font on the welcome screen
This will require the installation of
ttf-comfortaa by default on all editions.
Slideshow animation preview:
The slideshow text and maybe graphics (charts, images) is a subject for discussion.
I also have a text for slides per every official edition which needs to be discussed on how we can implement it better (@philm suggested to create packages for every DE but we can come up with other ideas)