title: perforce shelve examples
body: <p>I have codelines Foo v1 and Foo v2 checked out from the depot, where v2 was created
  from v1 by a p4 integrate command. I have some changes to Foo v1 which 
  are not checked in (I don't want them to be checked in) - but rather
  I want them applied to Foo v2.  </p>
  
  <p>How do I do this using p4 shelve?</p>