Update splash screen

[TheAdventurer64]

So, as you can see here, this is the current splash screen. However (in my opinion), this splash screen looks old, unprofessional, and outdated. Instead of using that splash screen, I propose something like this:

[tordans]

IMO first https://github.com/bryceco/GoMap/issues/408, then this.

[bryceco]

I agree with @tordans that any reworking of branding should be done first.