Squashed 'R-logo/' content from commit 0f5acdc

git-subtree-dir: R-logo
git-subtree-split: 0f5acdc0418d7969b43b6e4d30d7404d20b93fc7
Merge commit 'e1d64621e165ec9b17f48d0868ad93e8b73794aa' as 'R-logo'