Banner and welcome thread feedback

[burrrata]

Thanks for the feedback. Updated the Welcome thread accordingly.

@decentralion

Apropos of this discussion; I re-wrote some of the prose in SourceCred in 5 minutes to put a bit more emphasis on the “cred” of SourceCred, and use the game as a metaphor rather than saying SourceCred is a game.

Awesome! I re-wrote some of your re-write to simplify the language and add more emphasis on how Grain works.