not using buffer to save b/op

README.md

@@ -28,19 +28,27 @@ import (
 	rom "github.com/brandenc40/romannumeral"
 )
 
-func ExampleRomanToInt() {
-	integer, err := rom.ToInt("IV")
+func ExampleStringToInt() {
+	integer, err := rom.StringToInt("IV")
 	if err != nil {
 		panic(err)
 	}
-	fmt.Println(integer == 4)
+	fmt.Println(integer == 4) // True
 }
 
-func ExampleIntToRoman() {
-	roman, err := rom.FromInt(4)
+func ExampleBytesToInt() {
+	integer, err := rom.BytesToInt([]byte("IV"))
 	if err != nil {
 		panic(err)
 	}
-	fmt.Println(roman == "IV")
+	fmt.Println(integer == 4) // True
+}
+
+func ExampleIntToString() {
+	roman, err := rom.IntToString(4)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println(roman == "IV") // True
 }
 ```

romannumeral.go

@@ -53,14 +53,14 @@ func outOfBounds(input int) bool {
 }
 
 func intToRoman(input int) []byte {
-	output := bytes.Buffer{}
+	var output []byte
 	for _, rom := range _numerals {
 		for input >= rom.val {
-			output.Write(rom.sym)
+			output = append(output, rom.sym...)
 			input -= rom.val
 		}
 	}
-	return output.Bytes()
+	return output
 }
 
 // StringToInt converts a roman numeral string to an integer. Roman numerals for numbers