bolt/bolt — pull request #1723 by rossriley (2014-09-14 16:07:12+00:00)
Title: Better Support for non-composer Extensions 

A few changes to the extensions registration to enable quick post-initialize addition of a local extension.
In bootstrap the following will now work....
....
$app->initialize();
$app['extensions']->register(new My\Extension($app));
$app->run();
...