Initial commit
populate repo
document RIntro
Add '_RIntro/' from commit '8afae35aa0431c37d2b43bcc9fb0fdfdd5e1769f'

git-subtree-dir: _RIntro
git-subtree-mainline: 3c09504d5a417fab8bdb6783c3260e70f0d505c9
git-subtree-split: 8afae35aa0431c37d2b43bcc9fb0fdfdd5e1769f