Update README.md

hardware/v1.0/README.md

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 Here is information about the CubeSatSim v1.0 hardware
 
-I use PCBWay to fabricate PCBs.
+There are files for the main board, battery board, and STEM payload board of these types:
+
+cubesatsim-STEM-1.0_gerbers.zip      All gerber files used to fabricate PCBs
+cubesatsim-STEM-1.0_schematic.pdf    Schematic
+cubesatsim-STEM-1.0_board.png        View of board
+cubesatsim-STEM-1.0_board_fill.png   View of board with fill
+cubesatsim-STEM-1.0_topPCB.png       Top view of PCB generated by gerbers
+cubesatsim-STEM-1.0_bottomPCB.png    Bottom view of PCB generated by gerbers
+cubesatsim-STEM-1.0_tNames.pdf       Top outline of components
+cubesatsim-STEM-1.0_bNames.pdf       Bottom outline of components
+cubesatsim-STEM-1.0.mnt              top SMD component placement data
+cubesatsim-STEM-1.0.mnb              bottom SMD component placement data
+cubesatsim-STEM-1.0_bom.csv.txt      Bill of Materials in CSV format
+
+I use PCBWay to fabricate PCBs https://pcbway.com
 
 Board sets will soon be available on the AMSAT Store