Panasonic DC-S5 96MP raws are version 7 - new decompressor needed

[LebedevRI]

[rawspeed] (dc-s5_hr_96MP.RW2) virtual rawspeed::RawImage rawspeed::Rw2Decoder::decodeRawInternal(), line 151: Version 7 is unsupported

Originally posted by @LebedevRI in #242 (comment)

[ntsarb]

A quick note to add that Darktable currently crashes when attempting to open a 96MP raw image file from Panasonic DC-S5.

Also, when I enable the option in the camera to produce a standard resolution file alongside the 96MP one, this (smaller) file will also cause Darktable to crash upon opening.

Is there any way I can support the development of a fix, e.g. by providing sample image files?

[LebedevRI]

That was addressed by #412.