latest code update

- app icon
- starting with map view
- code cleanup

Signed-off-by: Peter Siegmund <mars3142@noreply.mars3142.dev>

main/include/app.h

@@ -32,6 +32,7 @@ public:
   int getCartridgeRef() const { return m_cartridgeRef; }
   cartridge::Cartridge* getCartridge() const { return m_cartridge.get(); }
   bool isCartridgeLoaded() const { return m_cartridge != nullptr; }
+  std::string getCartridgePath() const { return m_cartridgePath; }
 
 private:
   bool initLuaState();