Squashed 'core/' content from commit b43b00a

git-subtree-dir: core
git-subtree-split: b43b00a633b79f1a88749ac5b769a9f7499c447a
Merge commit 'bf7beb4bfb141cb0bc7d19758cbc858b15496f7c' as 'core'
Squashed 'bi/' content from commit 8cafd9d

git-subtree-dir: bi
git-subtree-split: 8cafd9de7c45d7122dc91af9a4eb032c3a0959b8
Merge commit '39302fc18b4f2479962984037a3ba0df7f7315b6' as 'bi'
untracked debug files, edit git ignore