Added comments on example

  * Commented on why we needed to add import code
  * Commented on the order of the AddJsonCommentField() for those who
don't make use of an editor that can show them the `go doc
autostruct.AutoStruct.AddJsonCommentField`

examples/main.go

@@ -17,10 +17,11 @@ func main() {
 		a.PlacePackageName()
 		a.Newline()
 		a.StartImports()
-		a.AddImport("time")
+		a.AddImport("time") // Because we want to use time.Time
 		a.EndImports()
 		a.Newline()
 		a.StartStruct("Person")
+		// fieldname, fieldtype, jsontag, comment
 		a.AddJsonCommentField("Name", "string", "name", "Person's name")
 		a.AddJsonCommentField("Age", "time.Time", "age", "Person's age, saved and loaded as unix")
 		a.AddJsonCommentField("Weight", "float32", "weight", "Person's weight in ounces")