restore README

README.md

@@ -1,5 +1,16 @@
 # Ultimate ECP5 Board
 
+## Fork Sand Fork
+
+This is a fork/clone by Fork Sand, Inc. of upstream repo:
+
+https://github.com/daveshah1/TrellisBoard
+
+![fs-trellisboard front](hardware/ecp5_mainboard/photo/fs-trellisboard-front-sm.jpg)
+![fs-trellisboard back](hardware/ecp5_mainboard/photo/fs-trellisboard-back-sm.jpg)
+
+## Upstream README
+
 WIP - Rev 1.0 prototypes currently under test...
 
 ![Photo of PCB rev 1.0](hardware/ecp5_mainboard/photo/rev10_top.jpg)