Squashed 'plugin_subtree1/' changes from ae83605..6c126a8

6c126a8 License change
3877d24 Add 'plugin_subtree1/' from commit 'ae836053cc8e51e40d35174f7cc15c838a6f4a3f'
f5fbf4d Initial commit

git-subtree-dir: plugin_subtree1
git-subtree-split: 6c126a8feb76c108cbffeb080a90b3c09690beaf
Merge commit '3ec04f9fee212a649993e6dfcc15d02ef0bba64e'