Print configuration.h version during startup (thanks hairykiwi)

Marlin/Configuration.h

 // Advanced settings can be found in Configuration_adv.h 
 // BASIC SETTINGS: select your board type, temperature sensor type, axis scaling, and endstop configuration
 
+//User specified version info of THIS file to display in [Pronterface, etc] terminal window during startup.
+//Implementation of an idea by Prof Braino to inform user that any changes made
+//to THIS file by the user have been successfully uploaded into firmware.
+#define STRING_VERSION_CONFIG_H "2012-02-08j" //Personal revision number for changes to THIS file.
+#define STRING_CONFIG_H_AUTHOR "username" //Who made the changes.
+
 // This determines the communication speed of the printer
 #define BAUDRATE 250000
 //#define BAUDRATE 115200

Marlin/Marlin.pde

 { 
   setup_powerhold();
   SERIAL.begin(BAUDRATE);
+  SERIAL_PROTOCOLLNPGM("start");
   SERIAL_ECHO_START;
+  SERIAL_ECHOPGM("Marlin: ");
   SERIAL_ECHOLNPGM(VERSION_STRING);
-  SERIAL_PROTOCOLLNPGM("start");
+  #ifdef STRING_VERSION_CONFIG_H
+    #ifdef STRING_CONFIG_H_AUTHOR
+      SERIAL_ECHO_START;
+      SERIAL_ECHOPGM("Configuration.h: ");
+      SERIAL_ECHOPGM(STRING_VERSION_CONFIG_H);
+      SERIAL_ECHOPGM(" | Author: ");
+      SERIAL_ECHOLNPGM(STRING_CONFIG_H_AUTHOR);
+    #endif
+  #endif
   SERIAL_ECHO_START;
   SERIAL_ECHOPGM("Free Memory:");
   SERIAL_ECHO(freeMemory());