add assignment turn-in template

bit spartan atm., because I'm not sure what I *always* want to say.
notes.md becoming a bit of a template; move folder

originally named 'c' because I was gonna write it in multiple languages,
but I spent lots of time on C, hah :>
atm, should keep this layout:
    homework
        yyyy-mm-dd-name
            notes.md
            project-name
...because it means project-name is sort of separate from everything
else if you want to copy it anywhere else.

need to consider yyyy-mm-dd and name biz...