Started working on the main library (nearly complete)

reader.go

@@ -0,0 +1,30 @@
+package squashfs
+
+import (
+	"io"
+	"time"
+
+	"github.com/CalebQ42/squashfs/squashfs"
+)
+
+type Reader struct {
+	*FS
+	r *squashfs.Reader
+}
+
+func NewReader(r io.ReaderAt) (*Reader, error) {
+	rdr, err := squashfs.NewReader(r)
+	if err != nil {
+		return nil, err
+	}
+	return &Reader{
+		r: rdr,
+		FS: &FS{
+			d: rdr.Root,
+		},
+	}, nil
+}
+
+func (r *Reader) ModTime() time.Time {
+	return time.Unix(int64(r.r.Superblock.ModTime), 0)
+}