PIR-tutorial:  Fixed some bugs.  Added some text to emphatize when I am showing PASM or PIR  Added a factorial example
PIR-tutorial:
 Fixed some bugs.
 Added some text to emphatize when I am showing PASM or PIR
 Added a factorial example


git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@12225 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot