Use dist install by default

GrahamCampbell · GrahamCampbell · commit f661e8aee02a · 2015-06-25T18:41:36.000+01:00
diff --git a/composer.json b/composer.json
@@ -28,6 +28,9 @@
             "GrahamCampbell\\Tests\\Navigation\\": "tests/"
         }
     },
+    "config": {
+        "preferred-install": "dist"
+    },
     "extra": {
         "branch-alias": {
             "dev-master": "2.1-dev"
