Modify behavior of Array() on non-array result.

Closes #10.

gjson.go

@@ -138,10 +138,11 @@ func (t Result) Float() float64 {
 	}
 }
 
-// Array returns back an array of children. The result must be a JSON array.
+// Array returns back an array of children. If the result is not
+// a JSON array, the return will be an array containing one result.
 func (t Result) Array() []Result {
 	if t.Type != JSON {
-		return nil
+		return []Result{t}
 	}
 	r := t.arrayOrMap('[', false)
 	return r.a

gjson_test.go

@@ -445,6 +445,18 @@ func TestUnmarshalMap(t *testing.T) {
 	}
 }
 
+func TestSingleArrayValue(t *testing.T) {
+	var json = `{"key": "value"}`
+	var result = Get(json, "key")
+	var array = result.Array()
+	if len(array) != 1 {
+		t.Fatal("array is empty")
+	}
+	if array[0].String() != "value" {
+		t.Fatal("got %s, should be %s", array[0].String(), "value")
+	}
+}
+
 type BenchStruct struct {
 	Widget struct {
 		Window struct {