Add another hardcoded scene. Also made a test file for hw3 that should cover all the commands.

tests/test_keys.hw3scene

@@ -0,0 +1,26 @@
+# line with a comment
+camera 0 0 -1 0 0 0 0 1 0 50
+
+point 0 4 0 .7 .2 .2
+point 4 -4 0 .2 .7 .2
+point -4 -4 0 .2 .2 .7
+
+color 1 1 1
+ambient 1 1 1
+sphere 0 0 0 .3
+
+color 1 0 0
+diffuse 0.4 0.4 0.4
+specular 0.4 0.4 0.4
+shininess 1
+emission 0 0 0
+
+pushTransform
+scale 0.1 0.1 0.1
+rotate 0 1 0 45
+popTransform
+
+pushTransform
+translate .4 0 0
+sphere 0 0 0 .1
+popTransform