Migrate report parsing code to library

Change-Id: I156290b8bf7fff314266f62980eb100af600198a

dmarcparser.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"github.com/gc1code/dmarcparser/dmarc"
+	"os"
+)
+
+func main() {
+
+	var filename = flag.String("filename", "none", "Path to DMARC Aggregate Report XML")
+
+	flag.Parse()
+
+	if *filename == "none" {
+		fmt.Printf("XML File required.\n")
+		return
+	}
+
+	xmlFile, err := os.Open(*filename) // For read access.
+	if err != nil {
+		fmt.Printf("os error: %v\n", err)
+		return
+	}
+	defer xmlFile.Close()
+
+	feedbackReport := dmarc.ParseReader(xmlFile)
+	fmt.Printf("XMLName: %#v\n", feedbackReport)
+}