Correct IPC gullwing docs re. deleted_pins and hidden_pins
The IPG gullwing generator docs are wrong: the keyword to delete pins is deleted_pins or hidden_pin, not exclude_pin_list.
Also expanded slightly with examples
If it's still not clear, I'm sure the wording could be better!
deleted_pins - no numbering skip:
hidden_pins - numbering skips
Edited by John Beard