Indicate more clearly that this is a fork

Author: joeytwiddle

README.md

@@ -1,4 +1,4 @@
-# Git Aware Prompt
+# Git Aware Prompt (joeytwiddle's fork)
 
 Working with Git and its great branching/merging features is
 amazing. Constantly switching branches can be confusing though as you have to
@@ -21,7 +21,7 @@ If you `cd` to a Git working directory, you will see the current Git branch
 name displayed in your terminal prompt. When you're not in a Git working
 directory, your prompt works like normal.
 
-This fork by joeytwiddle also:
+**This fork by joeytwiddle also:**
 - shows you how far your local branch is **ahead** or **behind** the repository's branch
 - shows how many files are **staged**
 - indicates when you have an un-popped **stash** (when the top stash entry was made on the current commit or the current branch)