Fix the Magento core installation

Use aydin-hassan's magento-composer-installer instead of the
magento-hackathons'
The old magento-hackathon installer failed.

see: https://github.com/AydinHassan/magento-core-composer-installer

Author: andreaskoch

composer.json

@@ -8,7 +8,9 @@
     "aschroder/smtp_pro": "v2.0.5",
     "gordonlesti/lesti_fpc": "1.3.6",
     "jeroenvermeulen/solarium": "v1.6.9-beta",
-    "magento-hackathon/magento-composer-installer": "3.0.6",
+    "aydin-hassan/magento-core-composer-installer": "*",
+    "colinmollenhour/modman": "*",
+    "theseer/autoload": "*",
     "magento/core": "1.9.2.4"
   },
   "require-dev": {