Use the LVER to define the lua version to compile against.
  Remove any core-file on "make clean".
  Don't try to decode header-fields.

  The code in place was bogus, we need a real solution.

  This is part of #66.
  Simplify --folder handling.

  We don't need to evaluate so much these days, now we have
 better primitives.
  Cleanup the stack better.

  This should close #94.
  Updated to remove prototype for orphaned function.