Add ultrasonic and gyro (untested)

libs/core/ultrasonic.ts

@@ -0,0 +1,22 @@
+namespace input {
+
+    export class UltraSonicSensor extends internal.UartSensor {
+        constructor() {
+            super()
+        }
+
+        _deviceType() {
+            return LMS.DEVICE_TYPE_ULTRASONIC
+        }
+
+        /** Get distance in mm */
+        getDistance() {
+            // it supposedly also has an inch mode, but we stick to mm
+            this._setMode(0)
+            return this.getNumber(NumberFormat.UInt16LE, 0) & 0x0fff
+        }
+    }
+
+    //% whenUsed
+    export const ultrasonic: UltraSonicSensor = new UltraSonicSensor()
+}