Update Gasoline\Message to finally store flash-messages in session
Update layouts of theme bootstrap
Update Controller\Base to allow requiring a theme's bootstrap.php file
Update theme bootstrap to use a bootstrap-file
Update Controller\Base::before() to set object $asset_paths to template

Can be used to quickly access soemthing like ```$asset_paths->js``` to get the asset path to the theme's js-files
Slight fix of Controller\Bsae: Move code out of try-catch
Move Gasauth to PKGPATH . 'gasauth'
Add Gasauth\Driver::get()
Update Controller\Authenticated to work with \Gasauth
Update theme bootstrap layouts to use \Gasauth