Add go syntax highlighting marker

README.md

@@ -19,44 +19,48 @@ This Decoder has the following enhancements...
 
 #### SeekTo
 
-    import "github.com/exponent-io/jsonpath"
+```go
+import "github.com/exponent-io/jsonpath"
 
-    var j = []byte(`[
-      {"Space": "YCbCr", "Point": {"Y": 255, "Cb": 0, "Cr": -10}},
-      {"Space": "RGB",   "Point": {"R": 98, "G": 218, "B": 255}}
-    ]`)
+var j = []byte(`[
+  {"Space": "YCbCr", "Point": {"Y": 255, "Cb": 0, "Cr": -10}},
+  {"Space": "RGB",   "Point": {"R": 98, "G": 218, "B": 255}}
+]`)
 
-    w := json.NewDecoder(bytes.NewReader(j))
-    var v interface{}
+w := json.NewDecoder(bytes.NewReader(j))
+var v interface{}
 
-    w.SeekTo(1, "Point", "G")
-    w.Decode(&v) // v is 218
+w.SeekTo(1, "Point", "G")
+w.Decode(&v) // v is 218
+```
 
 #### Scan with PathActions
 
-    var j = []byte(`{"colors":[
-      {"Space": "YCbCr", "Point": {"Y": 255, "Cb": 0, "Cr": -10, "A": 58}},
-      {"Space": "RGB",   "Point": {"R": 98, "G": 218, "B": 255, "A": 231}}
-    ]}`)
-
-    var actions PathActions
-
-    // Extract the value at Point.A
-    actions.Add(func(d *Decoder) error {
-      var alpha int
-      err := d.Decode(&alpha)
-      fmt.Printf("Alpha: %v\n", alpha)
-      return err
-    }, "Point", "A")
-
-    w := NewDecoder(bytes.NewReader(j))
-    w.SeekTo("colors", 0)
-
-    var ok = true
-    var err error
-    for ok {
-      ok, err = w.Scan(&actions)
-      if err != nil && err != io.EOF {
-        panic(err)
-      }
-    }
+```go
+var j = []byte(`{"colors":[
+  {"Space": "YCbCr", "Point": {"Y": 255, "Cb": 0, "Cr": -10, "A": 58}},
+  {"Space": "RGB",   "Point": {"R": 98, "G": 218, "B": 255, "A": 231}}
+]}`)
+
+var actions PathActions
+
+// Extract the value at Point.A
+actions.Add(func(d *Decoder) error {
+  var alpha int
+  err := d.Decode(&alpha)
+  fmt.Printf("Alpha: %v\n", alpha)
+  return err
+}, "Point", "A")
+
+w := NewDecoder(bytes.NewReader(j))
+w.SeekTo("colors", 0)
+
+var ok = true
+var err error
+for ok {
+  ok, err = w.Scan(&actions)
+  if err != nil && err != io.EOF {
+    panic(err)
+  }
+}
+```