Consistent order/formatting of pins files

Marlin/pins_99.h

@@ -23,31 +23,46 @@
 /**
  * Board 99 pin assignments
  */
+
 #define BOARD_NAME          "99 Unknown"
- 
+
+//
+// Limit Switches
+//
+#define X_STOP_PIN         16
+#define Y_STOP_PIN         67
+#define Z_STOP_PIN         59
+
+//
+// Steppers
+//
 #define X_STEP_PIN          2
 #define X_DIR_PIN           3
-#define X_ENABLE_PIN        -1
-#define X_STOP_PIN          16
+#define X_ENABLE_PIN       -1
 
 #define Y_STEP_PIN          5
 #define Y_DIR_PIN           6
 #define Y_ENABLE_PIN       -1
-#define Y_STOP_PIN          67
 
-#define Z_STEP_PIN          62
-#define Z_DIR_PIN           63
+#define Z_STEP_PIN         62
+#define Z_DIR_PIN          63
 #define Z_ENABLE_PIN       -1
-#define Z_STOP_PIN          59
 
-#define E0_STEP_PIN         65
-#define E0_DIR_PIN          66
+#define E0_STEP_PIN        65
+#define E0_DIR_PIN         66
 #define E0_ENABLE_PIN      -1
 
+//
+// Temperature Sensors
+//
+#define TEMP_0_PIN          6   // ANALOG INPUT - NOT DIGITAL OUTPUT
+#define TEMP_BED_PIN       10
+
+//
+// Heaters / Fans
+//
+#define HEATER_0_PIN       13
+#define HEATER_BED_PIN      4
+
 #define SDSS               53
 #define PS_ON_PIN           9
-
-#define HEATER_0_PIN        13
-#define TEMP_0_PIN          6   // MUST USE ANALOG INPUT NUMBERING NOT DIGITAL OUTPUT NUMBERING!!!!!!!!!
-#define HEATER_BED_PIN      4
-#define TEMP_BED_PIN       10