Added basic Scheduling Functionality

A JSON message can now be received on:
'vesper/DEV_ID/control/addSchedule"
Each message, must hold a "file" and "data".
The file is the month's name in 3 letter mode (eg jan, feb, mar)
The data is an entry for each day of the month.
Each day can be an array containing multiple items.

kincony examples/pcf8574 output (relays).cpp

@@ -0,0 +1,58 @@
+/*
+Blink led on PIN0
+by Mischianti Renzo <http://www.mischianti.org>
+
+https://www.mischianti.org/2019/01/02/pcf8574-i2c-digital-i-o-expander-fast-easy-usage/
+*/
+
+#include "Arduino.h"
+#include "PCF8574.h"
+
+// Set i2c address
+PCF8574 pcf8574(0x24,4,15);
+
+void setup()
+{
+    Serial.begin(115200);
+//    delay(1000);
+
+    // Set pinMode to OUTPUT
+    pcf8574.pinMode(P0, OUTPUT);
+  pcf8574.pinMode(P1, OUTPUT);
+  pcf8574.pinMode(P2, OUTPUT);
+  pcf8574.pinMode(P3, OUTPUT);
+  pcf8574.pinMode(P4, OUTPUT);
+  pcf8574.pinMode(P5, OUTPUT);
+
+
+  pcf8574.digitalWrite(P0, HIGH);
+  pcf8574.digitalWrite(P1, HIGH);
+  pcf8574.digitalWrite(P2, HIGH);
+  pcf8574.digitalWrite(P3, HIGH);
+  pcf8574.digitalWrite(P4, HIGH);
+  pcf8574.digitalWrite(P5, HIGH);
+
+    Serial.print("Init pcf8574...");
+    if (pcf8574.begin()){
+        Serial.println("OK");
+    }else{
+        Serial.println("KO");
+    }
+}
+
+void loop()
+{
+    delay(300);
+    pcf8574.digitalWrite(P0, LOW);
+  delay(300);
+  pcf8574.digitalWrite(P1, LOW);
+  delay(300);
+  pcf8574.digitalWrite(P2, LOW);
+  delay(300);
+  pcf8574.digitalWrite(P3, LOW);
+  delay(300);
+  pcf8574.digitalWrite(P4, LOW);
+  delay(300);
+  pcf8574.digitalWrite(P5, LOW);
+  delay(300);
+}