Updated readme, misc fixes

* Look for spark config in parent directories
* Version tracking via src/version

bin/spark

@@ -1,6 +1,12 @@
 #!/usr/bin/env php
 <?php
 
+if (file_exists(__DIR__."/../src/version"))
+    require_once __DIR__."/../src/version";
+else {
+    define("APP_VERSION", "dev");
+}
+
 require_once __DIR__."/../vendor/autoload.php";
 
 $app = new Spark\SparkApplication();