Laravel 5.5 autoload feature

[hailwood]

Probably makes sense to implement laravel 5.5s service provider autodiscovery.

See this pull request for an example from another package: https://github.com/barryvdh/laravel-debugbar/pull/643/files

[carbontwelve]

This has been staged for the 1.3 release which is currently held up by #15.