Get the default blueish material

Property definitions

gamnit :: more_materials $ Material :: new
	# Get the default blueish material
	new do return new SmoothMaterial(
		[0.0, 0.0, 0.3, 1.0],
		[0.0, 0.0, 0.6, 1.0],
		[1.0, 1.0, 1.0, 1.0])
lib/gamnit/depth/more_materials.nit:24,2--28,23