exercises/hearing: Replace 2012-04-uchichicago commit with 2012-02-trieste master
-rw-r--r-- 414 .gitmodules
-rw-r--r-- 784 README.md
-rw-r--r-- 13160 cheat-sheet.md
drwxr-xr-x - exercises
-rw-r--r-- 19953 instructor.md