add license and changes to the readme

README.md

@@ -47,4 +47,13 @@ With cron mode enabled, the servers must be queried by `cron.php`. For best resu
 On linux, this can be achieved by adding a line to your crontab like the one below.
 ```
 * * * * * php /path/to/cron.php > /dev/null 2>&1
-```
+```
+
+## License
+
+This project is released under the [MIT License](http://sguidetti.mit-license.org/).
+
+## Changes
+
+- Aug 03, 2015 [v.0.1.0]
+   * Initial release