Add fish wrapper

Signed-off-by: Georg Pfuetzenreuter <mail@georg-pfuetzenreuter.net>

catsit.fish

@@ -0,0 +1,9 @@
+function catsit
+	set pipe /run/catsit/catsitd
+	if [ -p $pipe ]
+		/usr/local/sbin/catsit -c $pipe $argv
+	end
+	if [ ! -p $pipe ]
+		echo "Connection impossible."
+	end
+end