Added CUSTOM_MENDEL_NAME option to Configuration.h and language.h

Also cosmetic comment changes and spelling corrections in printed
messages

ArduinoAddons/Arduino_0.xx/Gen6/bootloaders/atmega644p/ATmegaBOOT.c

@@ -168,7 +168,7 @@ int main(void)
     WDTCSR = 0;
 
     // Check if the WDT was used to reset, in which case we dont bootload and skip straight to the code. woot.
-    if (! (ch &  _BV(EXTRF))) // if its a not an external reset...
+    if (! (ch &  _BV(EXTRF))) // if it's a not an external reset...
       app_start();  // skip bootloader
 #endif