Add overview of Git Structures (align)

Author: Jeff Bogue

handout.md

@@ -17,9 +17,9 @@ DIR          INDEX        REPO         REMOTE
 ] WRITE
 ] CODE
 
---> add . -] (moves to index)
+  --> add . -] (moves to index)
 
---> commit --] (moves to repo)
+             --> commit --] (moves to repo)
 
---> push ----] (moves to remote)
+                          --> push ----] (moves to remote)
 ```