* Replace footer text
* add COPYING.txt file
* Add new logos
* Use new logos in all layouts
* New logos
* Check license key on startup
* Bypass license check when Mix.env == :dev
* Use new logos with smaller wordmarks
* Add generic logo_path/1 function
* Use new favicons everywhere
* Bypass license check in test env
* Use sha256 for license key hash
* Mix.env -> config_env()
* Use Mix.evn at compile time rather than runtime
* Mix format
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Co-authored-by: Uku Taht <uku.taht@gmail.com>
