Implement md5 hash in crypto library.

lib/crypto/crypto.dart

Index: lib/crypto/crypto.dart
diff --git a/lib/crypto/crypto.dart b/lib/crypto/crypto.dart
index f17c0f0e9c9c9d79aae83e3357eca9d592f381ae..217b613cd3e073cad420b2673ebc57591bf739f7 100644
--- a/lib/crypto/crypto.dart
+++ b/lib/crypto/crypto.dart
@@ -4,8 +4,9 @@
 
 #library('crypto');
 
+#source('hash_utils.dart');
 #source('hmac.dart');
-#source('sha_utils.dart');
+#source('md5.dart');
 #source('sha1.dart');
 #source('sha256.dart');
 
@@ -46,6 +47,13 @@ interface Hash {
 }
 
 /**
+ * MD5 hash function implementation.

[Søren Gjesse, 2012/05/03 13:31:12]

We could mention the issues with MD5 here.

[Mads Ager (google), 2012/05/08 08:32:37]

Done.

+ */
+interface MD5 extends Hash default _MD5 {
+  MD5();
+}
+
+/**
  * SHA1 hash function implementation.
  */
 interface SHA1 extends Hash default _SHA1 {