Fixed install script (bis)

src/config.js

@@ -0,0 +1,16 @@
+const refConfig = require('./default_config.json');
+const srcConfig = require('../config.json');
+
+const merge = function (ref, src) {
+    if (typeof ref !== typeof src) {
+        return ref;
+    } else if (typeof ref === 'object') {
+        const out = {};
+        Object.keys(ref).forEach(key => out[key] = merge(ref[key], src[key]));
+        return out;
+    } else {
+        return src;
+    }
+};
+
+module.exports = merge(refConfig, srcConfig);