Scalepixels IOP: cleanup(): do not free gui data!
Rotatepixels: new IOP

Needed to fix "45-deg rotated pixels" of some Fuju cameras (FinePix: S2Pro, F700, E550, ...)
Rotatepixels IOP: Fix off-by-one (borders were garbage)
iop_dependencies.py: add rotatepixels
Run iop_dependencies.py after merge!