dechensherpa: add main.go for GopherCon
dechensherpa: add main.go for GopherCon

Change-Id: I502621a512b616552f42b6e3159bbe4838735ddf
Reviewed-on: https://go-review.googlesource.com/48950
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>

golang/scratch