Cleanup data types

arn/Image.go

@@ -0,0 +1,10 @@
+package arn
+
+// Image represents an image with meta data.
+type Image struct {
+	Extension    string   `json:"extension"`
+	Width        int      `json:"width"`
+	Height       int      `json:"height"`
+	AverageColor HSLColor `json:"averageColor"`
+	LastModified int64    `json:"lastModified"`
+}