Removed increment of register I in opcode 0xF055 and 0xF065.

The original CHIP-8 design incremented I. However, on current implementations I is left unchanged.
Reference: https://en.wikipedia.org/wiki/CHIP-8#cite_note-memi-4

Chip8/Chip8.c

@@ -44,7 +44,7 @@
  The Chip8 system has a HEX based keypad (0x0 - 0xF).
  
  Opcode Table
- • NNN		address
+ • NNN		12-bit address
  • NN		8-bit constant
  • N		4-bit constant
  • X and Y	4-bit register identifier
@@ -562,15 +562,13 @@ void emulateCycle() {
 			for (unsigned char r = 0; r <= X; r++) {
 				memory[I+r] = V[r];
 			}
-			I = I + X + 1;
 			pc += 2;
 		}
 		else if (submaskedOpcode == 0x0065) {
 			unsigned char X = GetX(opcode);
 			for (unsigned char r = 0; r <= X; r++) {
 				V[r] = memory[I+r];
 			}
-			I = I + X + 1;
 			pc += 2;
 		}
 		else {