Initial commit
Add 'core/' from commit '186ce0d5d7f05e917d22de6edb8806aa6c1a03b7'

git-subtree-dir: core
git-subtree-mainline: 34781ebdc31f57deaa0f34698ad60a2483df7db1
git-subtree-split: 186ce0d5d7f05e917d22de6edb8806aa6c1a03b7
deleted test files