improve description

README.md

@@ -7,7 +7,7 @@
 
 ## What is `git-secret`?
 
-`git-secret` is a bash tool which stores private data inside a git repo. `git-secret` encrypts tracked files with public keys for all users whom you trust using `gpg`. Therefore, everyone has access to these tracked files using only their personal secret key. With `git-secret` changes to access rights is made easy and private-public key issues are avoided. Passwords do not needed changing with `git-secret` and when someone is out - just delete their public key, re-encrypt the files, and they won’t be able to decrypt secrets anymore.
+`git-secret` is a bash tool which stores private data inside a git repo. `git-secret` encrypts tracked files with public keys for users whom you trust using `gpg`, allowing permitted users to access encrypted data using their secret keys. With `git-secret` changes to access rights are made easy and private-public key issues are handled for you. Passwords do not need to be changed with `git-secret` when someone's permission is revoked - just remove their key from the keychain using `git secret killperson their@email.com`, and re-encrypt the files, and they won't be able to decrypt secrets anymore.
 
 
 ## Preview