Changeset : a495 + keyboard updates from nafraf in ...

a495 + keyboard updates from nafraf in ​http://chdk.setepontos.com/index.php?topic=650.msg104689#msg104689 - trunk r3061

• capt_seq_hdr.c and code_gen.txt files (I forgot to include them in previous patch).
  
• override GetBatteryTemperature?() to prevent crash
  
• kbd.c clean up.
  
• notes.txt update
  
• key names for KEY_FACE, KEY_MODE, KEY_HELP included in modules/script_key_funcs.c