- Abstract the memory stats into its own class.

- Fix a bug with debug mqtt
- nrf52 needs more love, there's a strange error while linking. Help appreciated

src/memGet.h

@@ -0,0 +1,18 @@
+#pragma once
+#ifndef _MT_MEMGET_H
+#define _MT_MEMGET_H
+
+#include <Arduino.h>
+
+class MemGet
+{
+  public:
+    uint32_t getFreeHeap();
+    uint32_t getHeapSize();
+    uint32_t getFreePsram();
+    uint32_t getPsramSize();
+};
+
+extern MemGet memGet;
+
+#endif