Checks a student problem set

The command will be put at the top of a student's problem set. It checks all exercises when the problem set is sourced. If something is wrong, an error is thrown and no more commands will be sourced.

check.problem.set(
  ps.name,
  stud.path,
  stud.short.file,
  reset = FALSE,
  set.warning.1 = TRUE,
  user.name = "GUEST",
  do.check = interactive(),
  verbose = FALSE,
  catch.errors = TRUE,
  from.knitr = isTRUE(getOption("knitr.in.progress")) | !interactive(),
  use.null.device = TRUE,
  just.init = FALSE,
  stud.code = NULL
)