changes from 0.06 to 0.07
=========================

 * changed error handling if exec() fails to avoid problems with block eval

changes from 0.05 to 0.06
=========================

  * added filehandle duping to reset STD* filenos in the child process

changes from 0.04 to 0.05
=========================

  * fixed the order of filehandle processing in the child process

changes from 0.02 to 0.04
=========================

  * fixed tests for better taint-mode handling

changes from 0.01 to 0.02
=========================

  * documentation fixes