* Made the console command system extender-friendly
* Added console extender
* Added ConsoleTestCase to integration tests
* Added integration tests for console extender
* Marked event-based console extension system as deprecated
* Moved trimming command output of whitespace into superclass
* Renamed 'add' to 'command'
* Added special processing for laravel commands
* Code style fixes
* More style fixes
* Fixed $this->container
