A "possible features" document was added

This way my ideas for the library can all be kept in one place
.strip() on student attribute

Some students were putting spaces before and after their name, causing
it to not sort/display correctly. This .strip() helps remedy that issue.
problem_number handling

problem_number had been changed elsewhere from a str to an int, but
that affected this output code here. This fix gets the str
representation before then trying to use it for output.