Fixed autoloading with composer.

To make autoloading with composer work, package needs to be installed in the PHPGoogleMaps directory (to follow PSR-0 standard).

Author: jakzal

composer.json

@@ -20,5 +20,6 @@
         "psr-0": {
             "PHPGoogleMaps": ""
         }
-    }
-}
+    },
+    "target-dir": "PHPGoogleMaps"
+}