title: Updating Hudson and plugins
body: <p>I was wondering which steps are the best to upgrade hudson and the plugins.</p>
  
  <p>I'm running 1.347 at the moment. I once tried to update which resulted into a mess because some plugins were incompatible.</p>
  
  <p>Also i want to delete some plugins is it appropriate to just delete the hpi file? It would be nice to know how other people do this step and in which order.<br>
  Should i first upgrade hudson and then plugin by plugin?<br>
  And if a plugin breaks something downgrade it again? It seems to be a lot of work.
  Or is there any easy way?<br>
  Also is it enough to save all the xml configuration files in case something breaks that i can recover?</p>
  
  <p>Thanks in advance.</p>