Update from waterwingz to temporarily disable NR overrides for SX50 to prevent crash:
http://chdk.setepontos.com/index.php?topic=650.msg99907#msg99907
A3100 updates from srsa_4c:
http://chdk.setepontos.com/index.php?topic=650.msg99942#msg99942
A3300 updates from nafraf:
http://chdk.setepontos.com/index.php?topic=650.msg99955#msg99955
Remove old loader code (missed from previous patch).