Improve core classes App, Output and Table. Add new aliases.
Improve default theme.
Improve demo with a CRUD UI.
Correct syntax on demo install.sql
Improve application output workflow.
\Arch\App::sendJSON(), \Arch\App::download() and alias o() now does not ends application but just sets output.
Application should always end with \Arch\App::endClean()
Fix demo calls to o() alias
Reducing number of log messages