Found some good squashfs documentation so I can start work

unsquash.go

@@ -0,0 +1,9 @@
+package squashfs
+
+import "io"
+
+//Squashfs is a squashfs backed by a reader.
+type Squashfs struct {
+	rdr   *io.Reader //underlyting reader
+	super Superblock
+}