update the seasonpass instructions

I think the SeaonsPass guide could add a couple things to help with the two areas people are having the most trouble with from everything I've read in support.

I was also having some trouble with iTunes starting up and restore automatically as said in step 5. Someone said to hold option to click restore in iTunes and select the file that seasonpass created.

Also, when you are trying to go into dfu mode, wait after you plug in your usb cable a few seconds for the led lights to blink quickly, then hold down the buttons on the remote.