Bugfixes and improvements

* Implemented the --image option
* Implemented the --write-state option to go with --check
* Fixed bug in Lockfile class

bin/freshdocker

@@ -7,6 +7,7 @@ if (file_exists(__DIR__."/../src/version.php")) {
     require_once __DIR__."/../src/version.php";
 } else {
     define("APP_VERSION", "DEV");
+    define("BUILD_DATE", "src");
 }
 
 $r = new NoccyLabs\FreshDocker\Refresher();