to be abstract views, and modified the LVS scripts accordingly
(they no longer need a special version of the netgen setup
script). LVS was verified on both caravel and caravan using this
setup.
connections to the core side VCCD1 and VSSD1 on the clamped3 pads.
Also added scripts for running LVS on chip_io to the mag/ directory,
and revised the scripts so that they will only re-run extraction if
there is no netlist file in the mag/ directory.
the clocking subcircuit from inside the pad area near the "clock"
pin to under the DLL. This prevents the DLL from having its
outputs travel all the way across the chip to reach the clocking
cell and then have the multiplexed clock travel all the way back,
especially as the DLL outputs are high-speed signals (up to 150
MHz).