Fix some tests and do some cleanup.

test/meta_block.inx

@@ -0,0 +1,16 @@
+meta {
+	name     : LitBasic;
+	category : Scene;
+}
+
+properties {
+	color : float4;
+}
+
+vertex main :: (pos : float3 @position, uv : float2 @uv) -> float3 @position {
+	return pos;
+}
+
+pixel main :: () -> float4 @target0 {
+	return properties.color;
+}