server, examples, extensions lint compliant (#1109)

these are all automated changes suggested by golint

examples/apps/blog/func.go

@@ -6,12 +6,12 @@ import (
 	"os"
 )
 
-type Person struct {
+type person struct {
 	Name string
 }
 
 func main() {
-	p := &Person{Name: "World"}
+	p := &person{Name: "World"}
 	json.NewDecoder(os.Stdin).Decode(p)
 	mapD := map[string]string{
 		"message": fmt.Sprintf("Hello %s", p.Name),