Simple simulation code

Builds a native program on MacOS that runs the NuEVI firmware compiled for x86_64.
Only input is arrow keys for menu buttons for now. Only output is console and display.

Copied some more library files into the simulation folder, and renamed the modified *.cpp files from the libraries to *_sim.cpp.

simulation/src/simeeprom.cpp

@@ -0,0 +1,30 @@
+
+#include <stdint.h>
+#include "EEPROM.h"
+
+// TODO: Fake eeprom a bit better, maybe even save to file.
+
+static char someFakeEEPROM_memory[4096];
+
+
+uint8_t EEPROMClass::read( int idx )
+{
+    return someFakeEEPROM_memory[idx];
+}
+
+
+void  EEPROMClass::write( int idx, uint8_t val )
+{
+    someFakeEEPROM_memory[idx] = val;
+}
+
+void  EEPROMClass::update( int idx, uint8_t val )
+{
+    someFakeEEPROM_memory[idx] = val;
+}
+uint16_t EEPROMClass::length()
+{
+    return sizeof(someFakeEEPROM_memory);
+}
+
+// TODO: Add missing functioality..