Update eeprom.c

Function eeprom_put_char's parameters did not align with the .h file.
Update gcode.c

home_select defined out of scope. Moved it outside the switch 
so the rest of the switch can see it properly. 
Update eeprom.c

Changed back
Update eeprom.h

Fixed the function signature.
Update gcode.c

Removed the home_select variable.
Merge pull request #200 from Protoneer/master

Fixed small bug.