dechensherpa: add main.go for GopherCon

Change-Id: I502621a512b616552f42b6e3159bbe4838735ddf
Reviewed-on: https://go-review.googlesource.com/48950
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

dechensherpa/main.go

@@ -0,0 +1,7 @@
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("Hello World!")
+}