Refactor out file scanner into separate package

scanner/file.go

@@ -0,0 +1,25 @@
+package scanner
+
+import "fmt"
+
+type File struct {
+	Name     string
+	Flags    uint32
+	Modified int64
+	Version  uint32
+	Size     int64
+	Blocks   []Block
+}
+
+func (f File) String() string {
+	return fmt.Sprintf("File{Name:%q, Flags:0x%x, Modified:%d, Version:%d, Size:%d, NumBlocks:%d}",
+		f.Name, f.Flags, f.Modified, f.Version, f.Size, len(f.Blocks))
+}
+
+func (f File) Equals(o File) bool {
+	return f.Modified == o.Modified && f.Version == o.Version
+}
+
+func (f File) NewerThan(o File) bool {
+	return f.Modified > o.Modified || (f.Modified == o.Modified && f.Version > o.Version)
+}