Added 3D model for TPSM53604

Merge branch 'iris-symbols' of https://github.com/calstar/hardware-sch-blocks into iris-symbols

Updated IRIS footprints and symbols

Updated IRIS footprints and symbols

Merge pull request #6 from calstar/stack-connector Updated CAS_physical, reduced pad diam by 1 mil

fix some relative paths

Added fixed symbol

Added 3D stack connectors

Added 3D models for stack connector

Modified IRIS symbols