update adalight sketch (#299)

* rename platform rpi-pwm to rpi. remove original rpi platform
install symlink to bin folder
create effects folder for custom effects

* fix osx jobs evaluation

* - add rewrite time to serial leds
- rework adalight sketch

* add analog output

* adalight: add analog mode: last led

* tune adalight sketch to final state
move refresh code to leddevice base class, so every leddevice can use it

libsrc/leddevice/schemas/schema-adalight.json

@@ -19,6 +19,13 @@
 			"default": 250,
 			"append" : "ms",
 			"propertyOrder" : 3
+		},
+		"rewriteTime": {
+			"type": "integer",
+			"title":"refresh time",
+			"default": 5000,
+			"append" : "ms",
+			"propertyOrder" : 4
 		}
 	},
 	"additionalProperties": true