Use hand cursor when dragging image to move it

Properties shall display SVG data

Render icon of image when also when dragging from the image collection

Save preferences to file

Automatically go to next picture

Animation support

"Properties" shall display Exif thumbnail if embedded

Colour space support

Add support for bicubic interpolation

Add support for Lanczos resampling

Add command line options for settings and panes:
	+f = no fullscreen
	-p = show property pane
	+p = hide property pane
	-c = show image collection
	+c = hide image collection
	-t = apply embedded orientation
	+t = do not embedded orientation
	-n = apply normal size is physical size
	+n = do not apply normal size is physical size
	-s NAME = apply scaling algorithm NAME
	-S SIZE = apply chequer size SIZE, 0 for no chequered background
	-C COLOUR1[:COLOUR2] = use COLOUR1 and COLOUR2 (= COLOUR1 if omitted) for the chequered background
	+C = do not apply chequered background