Add standalone cases (#3536)

tests/standalone/c-ray/scene

@@ -0,0 +1,18 @@
+# spheres
+#	position		radius	color			shininess	reflectivity
+s	-1.5 -0.3 -1	0.7		1.0 0.2 0.05		50.0	0.3
+s	1.5 -0.4 0		0.6		0.1 0.85 1.0		50.0	0.4
+
+# walls
+s	0 -1000 2		999		0.1 0.2 0.6			80.0	0.8
+
+# bouncing ball
+s	0 0 2			1		1.0 0.5 0.1			60.0	0.7
+
+# lights...
+l	-50 100 -50
+l	40 40 150
+
+# camera (there can be only one!)
+#	position	FOV		target
+c	0 6 -17		45		0 -1 0