Fix: Update README.md.
Squashed 'modules/base/admin_menu/' content from commit b07d37b

git-subtree-dir: modules/base/admin_menu
git-subtree-split: b07d37b857f48e8e38ca8c31fbb8153184c46932
Merge commit '23dd4b1e63fdd5a82cb23c01b60e9ac4e996668d' as 'modules/base/admin_menu'
Squashed 'modules/dev/ktools/' content from commit 7c546a6

git-subtree-dir: modules/dev/ktools
git-subtree-split: 7c546a6805f93334135eb1cf5c406b98ce06bedb
Merge commit '18e9200ece9031bf6b1db6a7bde2c1c2b6cb86e4' as 'modules/dev/ktools'
New: Track .gittrees.