Revision 3551

* Added test cases for NKSP core language aspects and core built-in
  functions.
* NKSP: Added method ScriptVM::setExitResultEnabled() which allows
  to explicitly enable the built-in exit() function to optionally
  accept one function argument; the value of the passed exit()
  function argument will then become available by calling
  VMExecContext::exitResult() after script execution.
* Bumped version (2.1.1.svn2).