Add README and NEWS file for upcoming release.

NEWS

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+Release 2.0.0
+=============
+
+ * This release consolidates the various versions of md5 that have
+   been floating around, including versions with Lispworks
+   optimizations, the version maintained by Kevin M. Rosenberg, the
+   SBCL-optimized version, and various patches and fixes.
+
+ * This release tries to separate out string-handling from actual
+   byte-based MD5 hash generation.  Hence users who want to generate
+   hashes from strings should use the new md5sum-string function,
+   which will go through your implementation's external-format
+   handling to generate the actual byte-array that is hashed.  Usage
+   of md5sum-sequence for strings and md5sum-stream for character
+   streams is deprecated, since it only ever worked correctly for 8bit
+   characters in most implementations.
+
+ * This release should work correctly on at least CMUCL, SBCL, ECL,
+   CCL, Lispworks, AllegroCL and ABCL and generally most other
+   conforming implementations.  It has been optimized for CMUCL, SBCL
+   and Lispworks, and should work with adequate performance on most
+   64bit implementations.  Performance on other 32bit implementations
+   is still sub-optimal if they don't support unboxed bit-operations
+   on (unsigned-byte 32).

README

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+This package implements The MD5 Message-Digest Algorithm, as defined
+in RFC 1321 by R. Rivest, published April 1992.
+
+It was originally written by Pierre R. Mai, with copious input from
+the cmucl-help mailing-list hosted at cons.org, in November 2001 and
+has been placed into the public domain.  In the meantime various fixes
+and improvements for other implementations as well as maintenance have
+been provided by Christophe Rhodes, Alexey Dejneka, Nathan Froyd,
+Andreas Fuchs, John Desoi, Dmitriy Ivanov, and Kevin M. Rosenberg, and
+have been reintegrated into this consolidated version by Pierre R. Mai.
+
+WARNING: The MD5 Message-Digest Algorithm has been compromised as a
+cryptographically secure hash for some time, with known theoretical
+and practical attacks.  Therefore use of this implemenation is only
+recommended for legacy uses or uses which do not require a
+cryptographically secure hash.  Use one of the newer SHA-2 and SHA-3
+secure hash standards, or whatever is currently deemed
+cryptographically secure for all other uses.

md5.asd

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 ;;;; MD5 --- RFC 1321 The MD5 Message-Digest Algorithm
-;;;;
 
 (cl:in-package #:cl-user)