Introduced new Maven module "App" for high-level web apps development.
Added new static string, mapper and class utils.
Improved classpath scanning and added support for custom class loader.
Improved class reflection utils.
Added support for forcing class reload in the custom class loader.
Changed url paths for the built-in OAuth handlers.
Added multi-class instanceOf util for convenience.
Redesigned and improved pages (and separated HTML tags into Html module).