* master:
pipistrello: grow fifos a bit (may make ise happier)
gui: don't scroll experiment editor on modified wheel (closes#303)
gui: ignore only unmodified wheelevents
pipistrello: shrink fifos a bit (may make ise happier)
pipistrello: use ttl_simple for pmod[4:8]
pipistrello: move the spi channel like kc705
doc: kc705.clock: add spi bus mappings (closes#321)
doc: add pipistrello spi bus
doc: add pipistrello pmod ttl channels
pipistrello: make pmod[4:8] available as ttls
pipistrello: adhere to pmod interface type 2 layout