[PD] control reference pd patch

  i made this as sort of an aid for myself to teach other people some

functionality of pd (so i wouldn't have to fumble through the demo patches). i haven't used it for that purpose, but it has come in handy to do a quick look up of a certain control internal. it's basically most of the graphics out of the built-in tutorial, and i think i may have added one or two things and also some comments for slightly ambiguous things. anyway for me it's come in handy more than a couple of times, i sometimes just have it up in the background when i'm building a patch.

                           scott

p.s. i did make it a while ago so there's some updating that could be done, but i'll leave that up to whoever might actually make use of it.