Added picture meme folders and 7 things to love about Grin#14

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Niels86 wants to merge 2 commits intomimblewimble:masterfrom Niels86:master

Commits on Jul 13, 2020

Added picture meme folders and 7 things to love about Grin
Niels86
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Commits on Aug 3, 2020

updated the 'Things to love about Grin' marketing after seeing the 2018 talk from Andrew Poolstra
Niels86
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