Fix for subtree mess
Revert "Fix for subtree mess"

This reverts commit b2da8906d4e4c9e656ebe921edc8be5423af98a8.
Trying to fix subtree mess more
Add 'lib/birdbrain/' from commit 'b2da8906d4e4c9e656ebe921edc8be5423af98a8'

git-subtree-dir: lib/birdbrain
git-subtree-mainline: 0ba013ebe2da448bbe1bdd5469f5b6153682aed8
git-subtree-split: b2da8906d4e4c9e656ebe921edc8be5423af98a8