refactored displays

FlippR-Driver/include/output/items/EightDigitDisplay.h

@@ -7,7 +7,7 @@
 
 #include "output/items/Display.h"
 
-#include <array>
+#include <string>
 
 namespace flippR_driver
 {
@@ -19,7 +19,9 @@ namespace items
 class EightDigitDisplay : public Display
 {
 public:
-  virtual void write_content(std::array<char , 8> content) = 0;
+  virtual ~EightDigitDisplay() = default;
+
+  virtual void write_content(std::string content) = 0;
 };
 
 }