Fixes display and fonts (#85)

* change simulator svg

* change radio image

* Remove google fonts cdn

* change color of 'advanced' button

* font fix

* font fix 2

* display fix

* change fullsceen simulator bg

* Continuous servo

* handle continuous state

* adding shims

* update rendering for continuous servos

* fixing sim

* fix sig

* typo

* fix sim

* bump pxt

* bump pxt

* rerun travis

libs/core/pinscompat.ts

@@ -48,6 +48,9 @@ interface PwmOnlyPin extends DigitalInOutPin, AnalogOutPin {
 
     //% parts=microservo trackArgs=0
     servoSetPulse(duration: number): void;
+
+    //% parts=microservo tracArgs=0
+    servoSetContinuous(value: boolean): void;
 }
 
 //% noRefCounting fixedInstances
@@ -109,6 +112,10 @@ class MicrobitPin implements AnalogInPin, AnalogOutPin, AnalogInOutPin, PwmOnlyP
         pins.servoWritePin(this.analogId(), value);
     }
 
+    servoSetContinuous(value: boolean): void {
+        pins.servoSetContinuous(this.analogId(), value);
+    }
+
     servoSetPulse(duration: number): void {
         pins.servoSetPulse(this.analogId(), duration);
     }