modular/shell/exercises/hearing: Replace 2012-04-uchichicago commit with 2012-02-trieste
Replace the copy-paste
bf93a25 (added data, 2012-03-20) from the
Chicago boot camp with the earlier
3e24204 (Added Da for Shell
example, 2012-01-30) from the Trieste boot camp [2].
[1]: https://github.com/thehackerwithin/UofCSCBC2012
[2]: https://github.com/thehackerwithin/PyTrieste
Ignore weird mac DS_Store files.
Added CC license.
Removed cruft.
Adding contributing guidelines.
Includes license, workflow, and file formats sections.
Adding some useful developer info and links to the README.
Signed-off-by: Matt Davis <jiffyclub@gmail.com>
Adding .gitignore.