Added ability to change elink and gpio iostandards.
Fixed TXI/TXO & RXI/RXO on wait (pushback) signals.
Mods for E64, changed version register.
Forgot IO standards for the GPIOs on E16 projects.
Bitstreams w/ new version register structure.
E64 uses LVDS for eLink.
No GPIOs imlemented, but there are still LVDS Rcvrs/Xmtrs on the GPIO pins (12 and 12).