bringing back show ports (#377)

* bringing back show ports

* added firmware links in docs

* updated color rendering

* better rendering of touch/ultra/ir

* better data per sensor

libs/touch-sensor/touch.ts

@@ -15,6 +15,10 @@ namespace sensors {
             return this._readPin6() > 2500 ? 1 : 0
         }
 
+        _info(): string {
+            return this._query() ? "pres" : "rel";
+        }
+
         _update(prev: number, curr: number) {
             this.button._update(curr > 0)
         }