#682 Add created() function for sprites

New function added:
  bool created(void);
to check if sprite has been rotated. Example:

if ( !spr.created() ) Serial.println("Sprite has not been created");

examples/Smooth Fonts/FLASH_Array/Unicode_test/Unicode_test.ino

@@ -31,7 +31,6 @@
 //====================================================================================
 //                                  Libraries
 //====================================================================================
-// Call up the SPIFFS FLASH filing system this is part of the ESP Core
 
 #include <TFT_eSPI.h>      // Hardware-specific library