add forgotten file

RegressionTests/Slit-2/slit.txt

+repeat(
+	translate(
+		 rectangle(
+			  0.04,0.002),
+	         -0.02,-0.02),
+      20,0,0.004)

[kraus]

It's again the asymmetric version of the multi-slit. Don't translate it in the x-direction!

[adelmann]

yes I know :) but it just a test :)