More complete instructions

bin/git_hooks/README.md

@@ -1,7 +1,7 @@
 This folder contains helper scripts for [Git hooks](https://www.atlassian.com/git/tutorials/git-hooks).
 
-To create a hook, make a file inside the directory `.git/hooks/` with the name of the hook you want to set up. Do not use a file extension.
-For example, if you want to set up a pre-commit hook, the file should be called `pre-commit`, or if you want a pre-push hook, it should be called `pre-push`.
+To create a hook, make a file inside the directory `.git/hooks/` with the name of the hook you want to set up. The file names will **not** include an extension like `.md` or `.txt`.
+For example, if you want to set up a pre-commit hook, the file should be called `pre-commit`, or if you want a pre-push hook, it should be called `pre-push`. Assuming you're on a unix based operating system, make sure the file is executable using `chmod +x <FILE NAME>`.  
 
 Once you've created that file, put the appropriate she-bang on the first line:
 ```bash