Update restbucksCRUD example to use "crypto" library rather than "eel".

Updated readme.md to add curl command to test the server.

examples/restbucksCRUD/src/utils/etag_utils.e

@@ -6,28 +6,19 @@ note
 class
 	ETAG_UTILS
 
-inherit
-	ARRAY_FACILITIES
-
 feature -- Access
 
 	md5_digest (a_string: STRING): STRING
 			-- Cryptographic hash function that produces a 128-bit (16-byte) hash value, based on `a_string'
 		local
 			md5: MD5
-			output: SPECIAL [NATURAL_8]
 		do
 			create md5.make
-			create output.make_filled (0, 16)
-			md5.sink_string (a_string)
-			md5.do_final (output, 0)
-			Result := as_natural_32_be (output, 0).to_hex_string
-			Result.append (as_natural_32_be (output, 4).to_hex_string)
-			Result.append (as_natural_32_be (output, 8).to_hex_string)
-			Result.append (as_natural_32_be (output, 12).to_hex_string)
+			md5.update_from_string (a_string)
+			Result := md5.digest_as_string
 		end
 
 note
-	copyright: "2011-2012, Javier Velilla and others"
+	copyright: "2011-2014, Javier Velilla and others"
 	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
 end