Spray canning or magic markering now takes time. Using a magic marker on an item takes 10 turns. Writing on the floor message length * 2 time.
Changed item description of notes from:
"%1$s on this %2$s is a note saying: "
into:
"%1$s on the %2$s is: "

So you get "Carved on the cooked meat is: I USED TO BE A CAT"
And not "Carved on this cooked meat is the note saying: I USED TO BE A CAT" which was a bit odd.

Removed the time usage from writing on objects. As you can also leave notes on objects in other ways I and I not know them all. So all or nothing. For now, only writing on floors takes time.
Put the (void)p; //unused back in.
Merge branch 'Spray_Can' of https://github.com/Soyweiser/Cataclysm-DDA into Soyweiser-Spray_Can