Adds stand alone _md5 and _sha1 modules for use by hashlib on systems
when the OpenSSL library is either not present or not found by setup.py.

These are derived from the public domain libtomcrypt (libtom.org) just like
the existing sha256 and sha512 modules.
diff --git a/setup.py b/setup.py
index a0a02cb..b2e1cac 100644
--- a/setup.py
+++ b/setup.py
@@ -618,6 +618,11 @@
             exts.append( Extension('_sha256', ['sha256module.c']) )
             exts.append( Extension('_sha512', ['sha512module.c']) )
 
+        if not openssl_ver:
+            # no openssl at all, use our own md5 and sha1
+            exts.append( Extension('_md5', ['md5module.c']) )
+            exts.append( Extension('_sha1', ['sha1module.c']) )
+
         # Modules that provide persistent dictionary-like semantics.  You will
         # probably want to arrange for at least one of them to be available on
         # your machine, though none are defined by default because of library