add lib
comm1
comm2
comm3
Remove split code.
Add 'lib/' from commit '79facbe038acee76d0dd9df718a08c3def5f95c3'

git-subtree-dir: lib
git-subtree-mainline: 3a5522bf58f9a86b8e1dc1d625804f2f44ebad71
git-subtree-split: 79facbe038acee76d0dd9df718a08c3def5f95c3