Relative URL handling added to Response type.

response.go

@@ -0,0 +1,25 @@
+package gezer
+
+import (
+	"github.com/PuerkitoBio/goquery"
+	"net/http"
+	"net/url"
+)
+
+type Response struct {
+	*http.Response
+	Body []byte
+	Doc  *goquery.Document
+
+	Gezer *Gezer
+}
+
+func (r *Response) JoinURL(relativeURL string) string {
+	parsedRelativeURL, err := url.Parse(relativeURL)
+	if err != nil {
+		return ""
+	}
+
+	joinedURL := r.Response.Request.URL.ResolveReference(parsedRelativeURL)
+	return joinedURL.String()
+}