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SX160IS Notes
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Porting thread: http://chdk.setepontos.com/index.php?topic=9523.msg97518#msg97518

To enter CHDK <Alt> mode use the Playback [>] button.
Disp or Video [o] button can be configured as <ALT> mode button too.

HDMI hotplug and analog AV detect are supported as alternate remote inputs.

KNOWN BUGS
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For Developers
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- Extended video time not implemented
- hook_raw_image_addr() & hook_alt_raw_image_addr() return the same value
- Tables in shooting.c not verified
- DNG calibration not done