[TASK] Add src/Tools.js containing small helper functions.

src/Tools.js

@@ -0,0 +1,13 @@
+//check whether all given params exist in an object
+//var success = .reqParamsGiven(["username", "password"], req.body);
+exports.reqParamsGiven = function (keys, obj) {
+	if(typeof(obj) != "object" || obj.length < 1) return false;
+	for(k in keys) {
+		var key = keys[k];
+		var value = obj[key];
+		if(value == undefined) {
+			return false;
+		}
+	}
+	return true;
+}