README.md in rickshaw-0.2.0 vs README.md in rickshaw-0.3.0

@@ -29,9 +29,20 @@
      => "34c15a6c0d68a79f320f7c0d11ab50f2cb9b0cb9f8bd791ce06340f7448df289"
 
     > "hello world".to_sha256
      => "b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9"
 
+    > "hello world".to_md5
+     => "5eb63bbbe01eeed093cb22bb8f5acdc3"
+
+    We can also pack/unpack our hashes to/from binary strings
+
+    > "hello world".to_sha1.packed_bytes
+      => "*\xAEl5\xC9O\xCF\xB4\x15\xDB\xE9_@\x8B\x9C\xE9\x1E\xE8F\xED"
+
+    > "*\xAEl5\xC9O\xCF\xB4\x15\xDB\xE9_@\x8B\x9C\xE9\x1E\xE8F\xED".unpacked_bytes
+      => "2aae6c35c94fcfb415dbe95f408b9ce91ee846ed"
+
 ## Contributing
 
 1. Fork it
 2. Create your feature branch (`git checkout -b my-new-feature`)
 3. Commit your changes (`git commit -am 'Add some feature'`)