Merge pull request #6 from hegdeashwin/chapters

Adds switch E.g.

Author: Ashwin Hegde

ch2/switch.go

@@ -0,0 +1,21 @@
+package main
+
+import "fmt"
+
+func main() {
+	i := 1
+
+	switch i {
+	case 0:
+		fmt.Println("Zero")
+
+	case 1:
+		fmt.Println("One")
+
+	case 2:
+		fmt.Println("Two")
+
+	default:
+		fmt.Println("Unknown number")
+	}
+}