Auto-Generated PDK Device Mapping Tables

[dan-fritchman]

Feature: automagically generate documentation tables along the lines of:

---

MyPDK

Mos Device Mapping

MosType	MosFamily	MosVth	Device Name
NMOS	CORE	STD	mypdk_nch
PMOS	CORE	STD	mypdk_pch
NMOS	CORE	LOW	mypdk_nch_lvt
PMOS	CORE	LOW	mypdk_pch_lvt
NMOS	IO	STD	mypdk_nch_io
PMOS	IO	STD	mypdk_pch_io

(etc)

Maybe this could add some more detail such as valid or default parameter values too. But primarily, tabulate the mappings.