Add file transport reader

This simply returns os.File reader

transport/file.go

@@ -0,0 +1,16 @@
+package transport
+
+import (
+	"os"
+
+	log "github.com/Sirupsen/logrus"
+)
+
+type fileReader struct {
+	filename string
+}
+
+func newFileReader(filname string) (*os.File, error) {
+	log.Infof("Reading file '%s'", filname)
+	return os.Open(filname)
+}