Create downloadable resource pack

[kaedroho]

(originally posted by @zerolab)

From the Wagtail slack:

maartenkling [8:50 AM] There should be a official logopack somewhere on wagtail.io

This is a good idea. The pack should contain the Wagtail logo, "made with Wagtail" badge and variations. Maybe even a short brand styleguide.

[zerolab]

+ 💯 for this.

Found https://wagtail.io/wagtail-badges/ which is only linked from the bottom of the about page. A start, but needs more and definitely should be more visible

[thibaudcolas]

@vossisboss what do you think of this?