Fix flag shorthand conflict. (#134)

Both the "verbose" flag in the cli root and the "version" flag in the
read command use the "v" shorthand, which causes a panic on read. This
patch drops the shorthand for the "verbose" flag.

cmd/root.go

@@ -47,7 +47,7 @@ var RootCmd = &cobra.Command{
 
 func init() {
 	RootCmd.PersistentFlags().IntVarP(&numRetries, "retries", "r", DefaultNumRetries, "For SSM, the number of retries we'll make before giving up")
-	RootCmd.PersistentFlags().BoolVarP(&verbose, "verbose", "v", false, "Print more information to STDOUT")
+	RootCmd.PersistentFlags().BoolVarP(&verbose, "verbose", "", false, "Print more information to STDOUT")
 }
 
 // Execute adds all child commands to the root command sets flags appropriately.