Scan existing Schematic for DUT and get pintypes

[Jetsama]

Add the ability to scan existing schematics for a device under test. This is useful for prebuilt schematics.

Currently to create maestro equations, a schematic must be generated. Instead, we can determine the DUT and then evaluate the pins to use maestro methods without schematic creation.

A new process flow would allow:

1. Morpheus Schematic load "LIBRARY" "CELL" "VIEW" <- needs to be implemented
2. Morpheus Schematic evaluate <-
3. Morpheus Maestro create equations
4. Morpheus Maestro create corners

[Jetsama]

Added method to schematic class to find DUT using cellview instances

def findDUT(self): for inst in self.cv.instances: if inst.cell_name == self.DUT.cell_name: self.DUTinst = inst #internal return inst return None #none found

Pintypes are already calculated by DUT symbol. No change other than running evaluate in the init for schematic class.