widgets refactor

render widgets server side
widgets can use all the data the template can use

src/database/mongo/helpers.js

@@ -6,7 +6,7 @@ helpers.toMap = function (data) {
 	var map = {};
 	for (var i = 0; i < data.length; i += 1) {
 		map[data[i]._key] = data[i];
-		data[i]._key = undefined;
+		delete data[i]._key;
 	}
 	return map;
 };