Raw Tone Curve updates

Replaced Nikon D800 Raw Tone Curve — the prior one seems to have been made incorrectly, possibly based on an odd Raw-file sample.

New Raw Tone Curve for D800E, identical to new D800 curve.

New Raw Tone Curve for Panasonic FZ200, from Gordks.

Replaced Fuji X100S Raw Tone Curve with a cleaner version.