Add a global before filter for the authentication
Skip authentication on "public" routes
Redirect with a informative message on unauthorized requests
Add a drop down menu to navigation for the authenticated user
Use $model->user->id instead of Auth::id() in Activity::log()
Add Tool model
Add support for the breadcrumbs
Merge remote-tracking branch "origin/refactorings" into refactorings

Conflicts:
	app/lang/en/views/pages/navigation.php
	app/views/shared/_navigation.blade.php