Added Entrance/Stairs unittype5 table lvlwrap.txt (#64)

pkg/data/entrance/description.go

@@ -0,0 +1,13 @@
+package entrance
+
+type Description struct {
+	ID        int
+	Name      string
+	SelectX   int
+	SelectY   int
+	SelectDX  int
+	SelectDY  int
+	OffsetX   int
+	OffsetY   int
+	Direction string
+}