Merge pull request #171 from jpf91/std.digest

Add std.digest documentation

std.ddoc

@@ -273,6 +273,10 @@ NAVIGATION_PHOBOS=
 	$(LI <a href="std_c_wcharh.html" title="Wide characters">std.c.wcharh</a>)
 	$(LI <a href="std_net_curl.html" title="High level curl wrapper">std.net.curl</a>)
 	$(LI <a href="std_net_isemail.html" title="Validate e-mail addresses">std.net.isemail</a>)
+	$(LI <a href="std_digest_digest.html" title="API for digest functions">std.digest.digest</a>)
+	$(LI <a href="std_digest_md.html" title="MD digest functions">std.digest.md</a>)
+	$(LI <a href="std_digest_sha.html" title="SHA digest functions">std.digest.sha</a>)
+	$(LI <a href="std_digest_crc.html" title="CRC digest functions">std.digest.crc</a>)
 	$(LI <a href="std_windows_charset.html" title="Conversion to/from Windows character sets">std.windows.charset</a>)
 	$(LI <a href="index.html#std_windows" title="Modules specific to Windows">std.windows</a>)
 	$(LI <a href="index.html#std_linux" title="Modules specific to Windows">std.linux</a>)