refactored displays

FlippR-Driver/src/output/items/OutputDisplay.h

@@ -12,6 +12,8 @@
 #include <cstdint>
 #include <output/items/Display.h>
 
+#include <string>
+
 namespace flippR_driver
 {
 namespace output
@@ -27,7 +29,7 @@ public:
 
 	virtual uint8_t get_address() const = 0;
 	virtual uint8_t get_id() const = 0;
-	virtual std::vector<uint8_t> get_content() const = 0;
+	virtual std::string get_content() const = 0;
 };
 
 }