document what app/users is
readme update
fix grammar in readme
Add 'users/proxy/' from commit 'fcf7bc1779d96f6f23e4651ed326f8d1e08dc761'

git-subtree-dir: users/proxy
git-subtree-mainline: 6e3ea191ecde78cb3216dbd176d9391de9e7bf5b
git-subtree-split: fcf7bc1779d96f6f23e4651ed326f8d1e08dc761
Add 'users/app/' from commit '222da978b070e137f0ce0893fd2f821660806785'

git-subtree-dir: users/app
git-subtree-mainline: 731e111efd3143f7fbf0c473a9564d0812bfeb7f
git-subtree-split: 222da978b070e137f0ce0893fd2f821660806785