Renamed any occurence of the word pypjua to core within the core

darcs-hash:20090210170145-58103-3e9a5b64d4fcf4ab9f42c01dca74cbcaacbbf575
Replaced PyPJUA with SIP core in exception messages of scripts

darcs-hash:20090210170933-58103-abe96755c3aa624cc113b0fcc5eaf277db220ec3