Fix #13 fixed composer to use satooshi/php-coveralls 0.6.*

Author: Martins Sipenko

composer.json

@@ -15,7 +15,7 @@
     "require": {
         "php": ">=5.3",
         "ext-curl": "*",
-        "satooshi/php-coveralls": "dev-master as 0.7.0",
+        "satooshi/php-coveralls": "0.6.*",
         "symfony/console": ">=2.0"
     },
     "require-dev": {