Sample app 2 edit
adding foo.txt to sample app 1
Add 'common/' from commit '6de72137f59ca821fc037006a1b4886fe1693e2d'

git-subtree-dir: common
git-subtree-mainline: 2d14dfac605bc832b3096147242de4bd6014b3cd
git-subtree-split: 6de72137f59ca821fc037006a1b4886fe1693e2d