making sure dev branch pulls dev core

Author: dmolsen

composer.json

@@ -25,7 +25,7 @@
 	},
 	"require": {
 		"php":              ">=5.3.6",
-		"pattern-lab/core": "0.*",
+		"pattern-lab/core": "dev-dev",
 		"twig/twig":        "1.*"
 	},
 	"extra": {