Initial commit
populate repo
document r functional prog
Add '_R-functional-programming/' from commit 'cdc3ef4854b69f703b157a3805ccb8cf07d91bba'

git-subtree-dir: _R-functional-programming
git-subtree-mainline: b30ef0ecd267520f0dc9111a14f4f59e30b61279
git-subtree-split: cdc3ef4854b69f703b157a3805ccb8cf07d91bba