Add setpoint setter

Mechanical really likes being able to tune shots easily...  This is
going to live for a bit.

Change-Id: I1c6ba3ffab2f50647af6fbbcbc64cfd5a913a452
diff --git a/y2020/setpoint.fbs b/y2020/setpoint.fbs
new file mode 100644
index 0000000..5f1af72
--- /dev/null
+++ b/y2020/setpoint.fbs
@@ -0,0 +1,11 @@
+namespace y2020.joysticks;
+
+table Setpoint {
+  accelerator:double;
+
+  finisher:double;
+
+  hood:double;
+}
+
+root_type Setpoint;